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Next-Gen PS5 & XSX |OT| Console tEch threaD

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rnlval

Member
Reality Check: Tim Sweeney (CEO of Epic Games)

1) "Sony's storage system is absolutely world class, not only the best in class in console but also the best in any platform"

Timestamped:




2) "This (demo) is what is possible in the absolute best hardware that is going to be relased at the end of the year"

Timestamped:


EPIC has claimed RTX 2070 Super (entry-level TU104) running the same UE5 demo has "pretty good performance".

https://www.pcgamer.com/unreal-engine-5-tech-demo/

Would this demo run on my PC with a RTX 2070 Super? Yes, according to Libreri, and I should get "pretty good" performance.
Epic Games chief technical officer Kim Libreri.
 
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On the subject of getting our hands on Lumen in the Land of Nanite as part of the UE5 SDK at the back end of 2021, it's still likely not going to tell us much if the developers are saying it's still early technology and the target is this visual quality at 60 FPS. If they can manage that over the next 18 months or so, it won't be comparable unless it can be run on a released PS5 again somehow?
 
Who knows. Elemental was shown in 2012 and released in 2014. Infiltrator was shown in 2013 and released in 2015. Hopefully Lumen in the Land of Nanite comes out much closer to when UE5 is made available. I think it will be a highly sought after benchmark in the PC space!

Also, when Unreal Engine was first demo'd on PS4, this was said during an interview which made me laugh:



Echos from the past.
Also is because they actually think is a good strategy (pc/ console warrior whatever) make everything using brute force, yes you can do it but that is not point, for which reason you will
present a technology which can be used in a console and then says also in PC well not all you know only those will more than 8GB of VRAM and depending of multiples factors even could
use 32GB of ram.

That is which doesn't make sounds logical with the business of Epic that is why they just just need more time to optimized and search an equilibrium a don't just say
"you can run it if use this huge quantity of ram but not worry you can use your slow SSD".

Is obvious the main problem is not because a PC doesn't has more GPU power is obvious it does, the things is you cannot juste make comparison of hardware under
NDA doesn't matter if you do against an already release hardware even worst if you brute force the demo will sound ridiculous some specs and will worst in the end.
 

Moses85

Member
Even though saying this in here can possibly get me killed, it was a marketing partnership between Sony and Epic.
Both companies don’t need marketing anymore. Epic has the Epic Store which prints money and Sony, is Sony...

Just kidding ;)
 
The nextgen systems are just now powerfully enough for them to refocus on it and mixed them into one system (lumen). But the features already exist in the engine other than SVOGI. Development just wasn't focused on them till 2 years ago. Fortnight money changed everything. Epic games went on a hiring spree for the rendering team.
We I never saw lumen in the last release but I am sure I am wrong, you should be the only person I read which knows everything
of the Unreal tech demo without the Tech talk of the engine and even better the only one which access to lumen...
 

xPikYx

Member
That racing cockpit manufacturer that posted about GT7 took the tweets/instagram posts down and have put this up.



They say that they know nothing about GT7 and their graphic design people used a mock logo that's circulating around the internet...but I've never actually seen that exact variant of the logo before so???

I dunno man, weird that a company that has obvious links with Sony/PlayStation would slip up like that

The good and bad of human beings is that they do mistakes. This is clearly the case, what we got to understand is what they have mistaken about. If the mistake is simply a wrong logo or the guy who did that misinterpreted the nda and put that logo accidentally and obviously now once the company realized the error is trying to cover that up by denying the shit out of it.
I really believe they know about gt7 and the guy just did a big silly mistake because the post is pretty clear, those are all upcoming racing games in 2020
 
Yeah because it makes total sense for the developer of a multiplatform engine to advertise and keep mentioning one specific console every chance he gets, even when it's not relevant to what he is explaining.
That depends if one of the architect make the hardware as you suggest your also will be happy, then you would presume that part of hardware is in part due to you.
 
Asus and Gigabyte can move pretty quickly on their high end motherboards (that naturally cost more than Scarlett). Mine has raid m.2 drives with cooling fans and heatsinks. Not that I can use that performance yet in games it does help me out in cad & video programs. I was getting pretty frustrated with my last build that was normal SSD, so I upgraded and the advantage for my use case has been refreshing.

Seeing that once you combine further architecture improvements and closed systems like consoles the gains will be greater. No doubt PC will also benefit to a greater and lesser degree. Some programs will be tailored to take advantage while others will ignore it for years. Look at how long it took some companies to embrace multi threaded programming.

To try and steer my thoughts back to a more succinct point, PC will make gains at huge price points and take a long time to reach low prices. The next two generations of graphics cards on the high end will be monsters.

Consoles will benefit from amazing 1st party Studios that are already crushing our eyes on a puny cpu and archaic "teraflops" with crappy IO solutions.

I say this based on what we have seen from AA developers already with tiny little offices. I enjoy the technology and the artistry of it all, so I don't care if a developer makes a game in the style of bioshock or the last of us.

I enjoy how they bring their art styles and worlds for us to enjoy.

Counting pixels is a huge amount of fun as are the debates, but I don't like getting bogged down in blaming a console if a developer only has the skills/money to make a modern game look like World of Warcraft. Some small studios have brought us great favorites to enjoy that barely looked better than Fortnite.

I do hope the rumors are true that the new dev tools and engines are easier for the studios to manage, because some big budget titles can sure use better stories and longer campaigns.

Hopefully, this is my 2 cents that actually makes sense. Ha

Edit: anyone see the new alpha user screenshots from Flight Simulator, what kind of black magic is that! I can't wait for the next Elder Scrolls if FS looks that good on the ground. (ignore my grammar, spelling, punctuation, and opinions)
I am expecting in some moment the motherboard will have some changes in order to make use this "era" of high bandwidth in general. So in 4 years again the only PC gamers
will be furious saying than the consoles stop the progress of graphics, the life cycle I think.

Flight Simulator looks gorgeous but about the Elder Scrolls if they continue with that old engine ... well will hurt :lollipop_Mr_Smith:

(Fallout 76)

aZFxqaK.png
 

Sinthor

Gold Member
People are losing their minds anyway. And again if you are trying to sell your product it seems strange to limit it to a portion of them.
Also why would it be less newsworthy to see it run at 60 FPS on high end pc hardware.

Oh my goodness. People are not listening. Tim Sweeney said the UE5 engine will run on most platforms. That's their business after all, making an engine that can work on everything from a phone to a PC. But he also said that THIS particular demo. THIS ONE, was made specifically for the PS5 and took advantage of it's strengths, particularly the super fast I/O that he said CANNOT be duplicated, even on the PC at this time. Would that particular demo run on other platforms? If one has the code and the UE5 engine on their platform, SURE. Will there be differences? YES. This is simple logic folk. I don't know why some are so threatened by the I/O and SSD speed issues that mean that particular demo at that particular quality can't be run elsewhere, at least right now (according to Tim Sweeney). Big deal! I'm sure they could have made a demo that took advantage of a PC being able to have 128GB of RAM or something else to show off whatever platform they chose. This demo had been meant to be playable on PS5 at GDC earlier this year. THAT IS ALL.
 
Yet there are no PC games, except for Star Citizen, which look like they're impossible on console.
Yes I am agree the problem of PC gaming is other not graphics.... is money, usually a pc gamer behave similar
then those will buy and high end smartphone, they are agree in spent $1000 USD but not in spent $5 USD in an app for buy it.

The PC gamer usually spent more money in its PC than the normal price of a console, but they are not used to buy game in release for
the complete price because 'I will buy it until Summer sale or once the price is around 20 dollar or less'.
 

xacto

Member
Having a nice looking demo run on an expensive pc would’ve been significantly less newsworthy, the point was to show what the engine can do on next gen consoles.
But it makes no sense to show 2 near identical videos showing the same demo. If they looked the same, or different, people would’ve lost their minds making extrapolations either way

They lost their minds anyway, denial is a terrible tool to align dreams with reality.
 

Sinthor

Gold Member
Flight Simulator is single-handedly selling me an XSX at the moment. I remember the days of deleting as much as I could from a 256Mb HDD without Windows crashing to have enough space to install Flight Simulator 95. So glad they're bringing it back and XSX is going to be bonkers value for getting in on some of that action.

I gotta say, the new flight simulator looks INSANE. Are the demos or videos shown so far, running on XSX? I can't recall it. Bottom line....wow. I read something about the insane amount of data being used for the visuals as well. Quite the technical feat!
 
I gotta say, the new flight simulator looks INSANE. Are the demos or videos shown so far, running on XSX? I can't recall it. Bottom line....wow. I read something about the insane amount of data being used for the visuals as well. Quite the technical feat!

I guess they'd be taken from PC. I've just checked now and it says Xbox One and Windows, but I'd be expecting a Series X announcement, maybe during a Series X first-party event. If it's coming to XSX that's a console sold for me.
 

FeiRR

Banned
I gotta say, the new flight simulator looks INSANE. Are the demos or videos shown so far, running on XSX? I can't recall it. Bottom line....wow. I read something about the insane amount of data being used for the visuals as well. Quite the technical feat!
It's PC but there's no problem with porting it to XSX because all that insane detail is streamed online from servers. With CPU fast enough to handle simulations, it should be perfectly doable on XSX. The thing is, it's a flying sim. You won't enjoy such a game unless you actually know how to fly a plane, which is many hours of learning. It's a small but very profitable market because spending $2-3k on hardware is still way cheaper than flying lessons and it takes away the danger of experimentation.
 

Sinthor

Gold Member
It's PC but there's no problem with porting it to XSX because all that insane detail is streamed online from servers. With CPU fast enough to handle simulations, it should be perfectly doable on XSX. The thing is, it's a flying sim. You won't enjoy such a game unless you actually know how to fly a plane, which is many hours of learning. It's a small but very profitable market because spending $2-3k on hardware is still way cheaper than flying lessons and it takes away the danger of experimentation.

Yeah, I know FS isn't really a "game" per se in that it has a MUCH steeper learning curve due to its very realism. Still just looks AMAZING though. That's right, I remember reading about that vast amount of data being cloud resident due to the size. I wouldn't imagine there'd be any problem getting that on the XSX. Consoles have gone more towards the PC standard at least with the CPU and GPU's. And there's definitely enough power in the XSX to run it since it seems comparable or better than mid-high to high end gaming rigs. I am curious how FS would transfer to the console controller model. You know, I wish they'd make the XSX and PS5 so you could use a keyboard and mouse again like you could with the PS3. That would let them put things like Flight Simulator on the console and really not have to worry much about making it work with the traditional controller. Plus I think it would be a nice option for us gamers. Oh well. Maybe someday!
 

FeiRR

Banned
Yeah, I know FS isn't really a "game" per se in that it has a MUCH steeper learning curve due to its very realism. Still just looks AMAZING though. That's right, I remember reading about that vast amount of data being cloud resident due to the size. I wouldn't imagine there'd be any problem getting that on the XSX. Consoles have gone more towards the PC standard at least with the CPU and GPU's. And there's definitely enough power in the XSX to run it since it seems comparable or better than mid-high to high end gaming rigs. I am curious how FS would transfer to the console controller model. You know, I wish they'd make the XSX and PS5 so you could use a keyboard and mouse again like you could with the PS3. That would let them put things like Flight Simulator on the console and really not have to worry much about making it work with the traditional controller. Plus I think it would be a nice option for us gamers. Oh well. Maybe someday!
If you plan to fly sims, you should buy dedicated controllers. KB+M isn't going to help you. Also it has nothing to do with hardware. You can play COD with KB+M on PS4 right now (which breaks the game for joypad users but that's stupid dev choices).
 

Sinthor

Gold Member
If you plan to fly sims, you should buy dedicated controllers. KB+M isn't going to help you. Also it has nothing to do with hardware. You can play COD with KB+M on PS4 right now (which breaks the game for joypad users but that's stupid dev choices).

Wow, really? I thought the keyboard support went out the window with the PS3. Cool! Yeah, I guess you need the specific controllers for a flight sim like that one. Well, still should be quite the cool package for PC and XSX owners! It definitely makes a great impression from what I've seen of it!
 

Shmunter

Member
It's PC but there's no problem with porting it to XSX because all that insane detail is streamed online from servers. With CPU fast enough to handle simulations, it should be perfectly doable on XSX. The thing is, it's a flying sim. You won't enjoy such a game unless you actually know how to fly a plane, which is many hours of learning. It's a small but very profitable market because spending $2-3k on hardware is still way cheaper than flying lessons and it takes away the danger of experimentation.
No danger? Pfft, forget it
 

Leyasu

Banned
It's in his Twitter replies when pushed by someone to make a comparison. He's also equally unable to give any indication when asked what kind of PC specs are required, saying he doesn't know, but we'll be able to benchmark UE5 soon enough.
He's very clear on the distinction between engine and demo made using said engine. Some people conflate the two.

EDIT: Here

He's asked why he can't end the speculation and why there's a reason for the wait.



Here he says it's too early to know what kind of PC is required to run the demo, but Unreal Engine 5 will be available next year and people can go wild benchmarking it (the engine).

What, are people supposed to believe that Epic games don’t have access to the beefiest Gaming PCs money can buy?? Is he trying to say that they haven’t done their own benchmarks?? Fucking hell.

I have been on the fence with this, taking a wait and see approach.. I also don’t like calling people liars either. But he is clearly hiding something. Yes I am aware that he said that PCs need to catch up in regards to the SSD I/O etc, but he would already know ffs.

Arguments to the contrary appear nothing more than naive after that tweet imo
 
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While the Asynchronous Compute Engines sit outside the CU, they seem to schedule their work to be done on the CUs themselves. That said, I don't know why there are multiple ACEs and how more of them scales etc.
Would love a GPU wizard to break it down for me.

I'd also love to know the expected impact cache scrubbers will have in mitigating the cache clear->miss->re-fetch process stalling a CU and lowering its effective utilisation. To get 10.2TF out of PS5, you'd need 100% utilisation on all CUs at all time, which will never happen, but depending on the above, it might be able to get closer to (while never acheiving) that theoretical maximum.
CU occupancy in many PS4 / XB1 games is about 40%. There is still an ample room for manoeuvre for higher CU occupancy without reaching PS5 power limit.

100% will never happen in games. Ever. It's more like getting closer to 50% or 60%.
 
What, are people supposed to believe that Epic games don’t have access to the beefiest Gaming PCs money can buy?? Is he trying to say that they haven’t done their own benchmarks?? Fucking hell.

I have been on the fence with this, taking a wait and see approach.. I also don’t like calling people liars either. But he is clearly hiding something. Yes I am aware that he said that PCs need to catch up in regards to the SSD I/O etc, but he would already know ffs.

Arguments to the contrary appear nothing more than naive after that tweet imo

That's one interpretation, and a very strong and incredulous one at that. But it's also asking him to predict the future, not just of the PC hardware availability in late 2021, but of UE5 performance in late 2021, which will be when this is actually being made available to the public after hopefully reaching their 60 FPS target. This isn't a finished product or using mature technology. This is something that was made for GDC and probably programmed in such a way as to rely on PS5 IO and SDK as it currently stands.
It's too early to say because it's too early to really say, not because nobody has a clue how much data it's using and what kind of IO latency is involved.

A game development company has about as much interest in a top 99.99% PC running some shredding RAID NVMe setup as they do some data centre hardware. Neither are really relevant to making games for the PC market, where instead you design for an average PC and then give scaling options for enthusiast GPUs to allow the same fundamental game at higher resolutions or with fancier shaders.
 
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Leyasu

Banned
That's one interpretation, and a very strong and incredulous one at that. But it's also asking him to predict the future, not just of the PC hardware availability in late 2021, but of UE5 performance in late 2021, which will be when this is actually being made available to the public after hopefully reaching their 60 FPS target. This isn't a finished product or using mature technology. This is something that was made for GDC and probably programmed in such a way as to rely on PS5 IO and SDK as it currently stands.
It's too early to say because it's too early to really say, not because nobody has a clue how much data it's using and what kind of IO latency is involved.

Nobody is asking him to predict the future. They basically asked him what pc configuration was needed to play the demo, and he pretended not to know.

Which is unbelievable. I don’t know how people are still trying to follow his narrative.
 
CU occupancy in many PS4 / XB1 games is about 40%. There is still an ample room for manoeuvre for higher CU occupancy without reaching PS5 power limit.

100% will never happen in games. Ever. It's more like getting closer to 50% or 60%.

This seemed to be what Cerny was getting at when pressed for what it would take for the GPU to down-clock appreciably. He suggested you could write something specific to basically flip every transistor relentlessly, but the same code would cause a PS4 to crash/overheat.

Do you have a source on that ~40% figure? I don't doubt it as Nanite seems to rely heavily on Async Compute which can bump up that occupancy. I wonder to what extent the cache scrubbers mitigating the entire cache getting invalidated keeps them occupied. Maybe only in certain situations? But presumably enough to justify the expense? Is there any way of doing some telemetry on a PC GPU to see how often their caches get invalidated?
 
Nobody is asking him to predict the future. They basically asked him what pc configuration was needed to play the demo, and he pretended not to know.

Which is unbelievable. I don’t know how people are still trying to follow his narrative.

You're assuming they've already made a PC build of the PS5 demo and have run it on various configurations to benchmark it and get an idea of what is or would be required in future. What if at this stage it was built on/for a PS5 dev-kit using PS5 SDK ready for GDC 2020? This is all work in progress. Nanite, Lumen and UE5 are still well over a year away from being ready for public release. It makes no sense to start quoting required specs if they're going to be changing constantly over the next few months.
You're free to have your suspicions, but to effectively call anyone that doesn't agree with you an idiot or gullible is a bit silly in my opinion.
 
I can see Sony has already planned ahead for the stacked APU method (36+36=72CU) with probably 20.6TF or higher using existing die which should result in a decent pricetag and great machine overall. The internal SSD size might still be the same but we should get a real compatible external SSD by then that matches/exceeds the internal beyond current NVMe architecture.

Xbox refresh? It'll be interesting if they launch a limp Lockhart which I highly doubt it'll make then ready for a higher model. They might make a new die just like with X1X which is not cost efficient, as by then AMD should abandon anything higher than 36-40CU per die with their stacked tech which makes a chiplet of a unique die non-cost-friendly.

Speculating, though.
Unless Sony wants to go completely crazy and use Leviathan instead of Kraken on the Pro, if there'll even be a Pro. Only time will tell, it's way too early to tell and the PS5 hasn't even released yet.
 

HAL-01

Member
So what do y’all think ps5 will look like I think it’ll be suspiciously small, like PS4 slim kinda size, white matte body black base, shaped kinda like a Mac mini but with less rounded sides
 

FeiRR

Banned
You're assuming they've already made a PC build of the PS5 demo and have run it on various configurations to benchmark it and get an idea of what is or would be required in future. What if at this stage it was built on/for a PS5 dev-kit using PS5 SDK ready for GDC 2020? This is all work in progress. Nanite, Lumen and UE5 are still well over a year away from being ready for public release. It makes no sense to start quoting required specs if they're going to be changing constantly over the next few months.
You're free to have your suspicions, but to effectively call anyone that doesn't agree with you an idiot or gullible is a bit silly in my opinion.
Come on, of course they've run benchmarks on PC. That's where the development of any engine starts nowadays. But it doesn't mean it's ready for PC release nor they're ready to share anything. Gaming industry is quite peculiar in that respect: can you imagine car designers sharing every detail of their technological process with drivers? There's millions of dollars in R&D you're just not going to make public because those are your valuable assets.

So what do y’all think ps5 will look like I think it’ll be suspiciously small, like PS4 slim kinda size, white matte body black base, shaped kinda like a Mac mini but with less rounded sides
I expect it to be similar size to PS4 Pro or a bit bigger. Remember that SSD chips take much less space than a mechanical drive (in terms of heat, I don't know). As it has to match DS colour, it'll probably be white-black in design. I don't like that idea but not that I care much.
 
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Come on, of course they've run benchmarks on PC. That's where the development of any engine starts nowadays. But it doesn't mean it's ready for PC release nor they're ready to share anything. Gaming industry is quite peculiar in that respect: can you imagine car designers sharing every detail of their technological process with drivers? There's millions of dollars in R&D you're just not going to make public because those are your valuable assets.


I expect it to be similar size to PS4 Pro or a bit bigger. Remember that SSD chips take much less space than a mechanical drive (in terms of heat, I don't know). As it has to match DS colour, it'll probably be white-black in design. I don't like that idea but not that I care much.

I don't doubt it was developed on a PC, that's how it's done, but if this demo is being made for and with Sony on a specific bit of hardware, the development PCs will be using that hardware's SDK for its engine features (they mention they used PS5's primitive shaders as another example).
Having this SDK installed allows you to emulate functionality before running it native on the dev-kit, but it isn't helpful in telling you what your performance would have been if you'd developed it with PC architecture and Windows GPU drivers in mind from the beginning.
That they're not ready to start quoting requirements because the engine and technology is still in its infancy was kind of my original point, and to me is exactly what I assumed when Sweeney said it's too early to say. Like it's literally too early to be saying that.
 

HAL-01

Member
I expect it to be similar size to PS4 Pro or a bit bigger. Remember that SSD chips take much less space than a mechanical drive (in terms of heat, I don't know). As it has to match DS colour, it'll probably be white-black in design. I don't like that idea but not that I care much.
I could see them going for a throwback ps2 kind of design, but this time going for the full monolith look. Perhaps an xsx on a diet
lsHjEda.jpg
 
I’d love that the UE5 demo could run on a SX. Just imagine the room for improvement in assets streaming in the PS5.

This is what has me stumped at the moment. I'm playing Devil's Advocate versus people just asserting things based on gut feelings or wishful thinking because that's what being bored in a speculation and analysis thread is for, but in reality I have no fucking clue what was required to run the Lumen demo as far as IO goes. Contrary to what people might think, I wouldn't be that surprised to learn that it only took half of what PS5 IO was offering, or even less.

But what does seem crazy to me is that a multi-year conversation between Sony and Epic, between Cerny and Sweeney, resulted in Sony creating a 5.5GB/s SSD with completely custom flash controller to drive it, putting bets on the PC market having an expansion drive of the right size and cooling ability ready sometime in early 2021, and having a main chip relatively dominated by fixed function accelerator silicon for IO, and even having that IO pipeline extend as far as the GPU caches themselves, at the expense of just bunging in more CUs for an easy bit of marketing win, and all of this effort after all of this research is far in excess of what is currently or ever needed to enable what it is Cerny was saying it would.

I personally think you'd need to be naive to think Sony have got it that wrong.
If the Lumen demo ran precisely the same (from an IO standpoint) on XSX, then what on earth are Sony anticipating? And what on earth are Cerny and Sweeney talking about? They aren't idiots.
 

Leyasu

Banned
You're assuming they've already made a PC build of the PS5 demo and have run it on various configurations to benchmark it and get an idea of what is or would be required in future. What if at this stage it was built on/for a PS5 dev-kit using PS5 SDK ready for GDC 2020? This is all work in progress. Nanite, Lumen and UE5 are still well over a year away from being ready for public release. It makes no sense to start quoting required specs if they're going to be changing constantly over the next few months.
You're free to have your suspicions, but to effectively call anyone that doesn't agree with you an idiot or gullible is a bit silly in my opinion.
What you say could be right, and you are right to say that I am being silly....

But, isn’t most of the dev environment on a pc? The question was if the demo would work on a pc and what config is needed. I really have a hard time believing that they don’t have a reasonable idea of what would be needed to run it.

I know it is a long way from release, but that wasn’t the question. No need to be evasive.
 

Radical_3d

Member
This is what has me stumped at the moment. I'm playing Devil's Advocate versus people just asserting things based on gut feelings or wishful thinking because that's what being bored in a speculation and analysis thread is for, but in reality I have no fucking clue what was required to run the Lumen demo as far as IO goes. Contrary to what people might think, I wouldn't be that surprised to learn that it only took half of what PS5 IO was offering, or even less.

But what does seem crazy to me is that a multi-year conversation between Sony and Epic, between Cerny and Sweeney, resulted in Sony creating a 5.5GB/s SSD with completely custom flash controller to drive it, putting bets on the PC market having an expansion drive of the right size and cooling ability ready sometime in early 2021, and having a main chip relatively dominated by fixed function accelerator silicon for IO, and even having that IO pipeline extend as far as the GPU caches themselves, at the expense of just bunging in more CUs for an easy bit of marketing win, and all of this effort after all of this research is far in excess of what is currently or ever needed to enable what it is Cerny was saying it would.

I personally think you'd need to be naive to think Sony have got it that wrong.
If the Lumen demo ran precisely the same (from an IO standpoint) on XSX, then what on earth are Sony anticipating? And what on earth are Cerny and Sweeney talking about? They aren't idiots.
And it’ll make more sense to make a demo for all platforms than for only one.
 

Leyasu

Banned
This is what has me stumped at the moment. I'm playing Devil's Advocate versus people just asserting things based on gut feelings or wishful thinking because that's what being bored in a speculation and analysis thread is for, but in reality I have no fucking clue what was required to run the Lumen demo as far as IO goes. Contrary to what people might think, I wouldn't be that surprised to learn that it only took half of what PS5 IO was offering, or even less.

But what does seem crazy to me is that a multi-year conversation between Sony and Epic, between Cerny and Sweeney, resulted in Sony creating a 5.5GB/s SSD with completely custom flash controller to drive it, putting bets on the PC market having an expansion drive of the right size and cooling ability ready sometime in early 2021, and having a main chip relatively dominated by fixed function accelerator silicon for IO, and even having that IO pipeline extend as far as the GPU caches themselves, at the expense of just bunging in more CUs for an easy bit of marketing win, and all of this effort after all of this research is far in excess of what is currently or ever needed to enable what it is Cerny was saying it would.

I personally think you'd need to be naive to think Sony have got it that wrong.
If the Lumen demo ran precisely the same (from an IO standpoint) on XSX, then what on earth are Sony anticipating? And what on earth are Cerny and Sweeney talking about? They aren't idiots.
No one is saying that anybody are idiots. No is saying that they have got it wrong either.

People are saying wait for the games. Wait and see what what is what and what is not. Seeing as Microsoft decided to put a decent SSD in their console could mean that epic had also have spoken to them about its importance for their new engine. Especially as Microsoft’s studios use unreal more than Sony’s.

Who knows? I get the feeling that you are not far from the path when you said that it could turn out that the demo didn’t even use everything that the ps5 had to offer
 
What you say could be right, and you are right to say that I am being silly....

But, isn’t most of the dev environment on a pc? The question was if the demo would work on a pc and what config is needed. I really have a hard time believing that they don’t have a reasonable idea of what would be needed to run it.

I know it is a long way from release, but that wasn’t the question. No need to be evasive.

Again it comes back to what is meant by "it". "It" the in work game engine with the Nanite and Lumen technology that will have been in development years before they got a PS5 dev-kit? Or "it" the playable GDC demo made with Sony using a PS5 dev-kit?

You're right that both will absolutely be programmed on a PC, but if Sony's playable GDC demo was a project entirely designed for PS5, then the PCs set up for developing that game would be using a software development kit, or UE5 engine extensions to specifically target its hardware and talk through its APIs. They'll be using Sony APIs for programming the primitive shaders. They'll be using Sony APIs for using accessing the storage. All developed and tested and functionally emulated on a PC, but profiled and bench-marked on the dev-kit itself.

Kind of like when making an Android or iOS app. You use Android/iOS APIs while programming it on your PC, even running it at a slower speed in an emulator before pushing it to the real hardware and profiling it.
If you've made Sony a playable demo in your generic engine using your new technology and using Sony's APIs for accessing storage and GPU features, not to mention Sony's own graphics API as they don't use DirectX or likely anything PC related for rendering, that doesn't mean you'll know how well it would then work on various configurations of PC without basically making Sony's playable GDC demo with those APIs ripped out and the game programmed for PC architecture using standard libraries and PC drivers.
If I've made a 3D game for iOS using a desktop computer and Apples Metal graphics API, I'd have no idea how well it could run natively on a PC unless I rewrote large parts of it for PC, swapped out Metal for DirectX, OpenGL or Vulkan or something etc. Even though I can run it functionally perfectly fine in the editor or through the emulator on the desktop I'm using to develop it.

And it’ll make more sense to make a demo for all platforms than for only one.

But this was a demo made for/with Sony for PS5 on a PS5 dev-kit. Sony wouldn't even let Epic make the flying scene playable in case people were able to fly out of the world and break the game, or see that they hadn't bothered to make art assets for the views to the side. Why would something this specific and made for a specific event also have been written for PC? I'm not saying it wasn't, but I'm not as convinced that it's clear they would have. I'm sure 18 months from now when the engine and the new technology is more mature and optimised they'll bundle this demo with it, and have made a PC build of it. But this far away from release, for something made for a Sony GDC event? I just don't think you can absolutely say they would have.

No one is saying that anybody are idiots. No is saying that they have got it wrong either.

People are saying wait for the games. Wait and see what what is what and what is not. Seeing as Microsoft decided to put a decent SSD in their console could mean that epic had also have spoken to them about its importance for their new engine. Especially as Microsoft’s studios use unreal more than Sony’s.

Who knows? I get the feeling that you are not far from the path when you said that it could turn out that the demo didn’t even use everything that the ps5 had to offer

Who knows, maybe it didn't even tickle PS5's IO, or wouldn't even have stressed XSX's IO either. I'm not really that bothered either way if I'm honest. But if that is the case, what the hell is Sony planning for with the IO they have provided? Is it miscalculated and completely overkill? Even for this specific PS5 demo that Sony had creative control over?
I'm not asking that as some kind of challenge at you by the way, I'm genuinely interested in what the suggestion that Lumen is no big deal from an IO perspective actually means if true.
 
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I also don't doubt Sony and Epic had a joint marketing deal to make this demonstration for PS5, it's the natural conclusion to the conversations they've had. that lead to PS5 and UE5 ending up where they have.

But that doesn't then just mean it's nothing but a marketing stunt and any old NVMe equipped system could run it in its current state at the same level of detail. If Sony were smart they'd have asked Epic to make something that really makes use of their specific IO, no matter how excessive and pointless it is to use that much bandwidth, purely to demonstrate what can be done.

In other words it can be both: it being marketing and it being genuinely a (pointlessly excessive?) test of PS5 IO aren't mutually exclusive, and it would make less sense for such a marketing deal to result in Epic making something that doesn't play to PS5's strengths and could run on pretty mid-range IO. That would be doing Sony a disservice.

My point is a lot of the "facts" being banded around to dismiss all this as smoke and mirrors actually raise more questions than they answer, and end up implying things that then actually end up making less sense than before when you think about it for more than a moment.

Did Sony massively drop the ball and overspend despite the collaboration? There's not a trivial difference in storage speed between PS5 and XSX.
Did Epic under deliver on Sony's PS5 demo, and is being coy about answering performance related questions exactly because they didn't do it justice?

These are interesting questions to me.
 
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