-Amon-
Member
25 % increase in clock speed is huge. Great news. And if it's true will be great fun reading how this will be spinned into a "negligible upgrade".
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RUMOR: PS4 CPU to run at 2GHz
- Thread starter Lagspike_exe
- Start date
25 % increase in clock speed is huge. Great news. And if it's true will be great fun reading how this will be spinned into a "negligible upgrade".
Theonik
Member
Clockspeed is free, well I should say "free" because higher clockspeeds mean more power consumption so it may be necessary to use better cooling, also potentially may limit effective yield on PS4 CPUs. (by going lower clock you can harvest lower bin CPUs)
In this case though I doubt it has much effect, it's probably a no-brainer.
Panajev2001a
GAF's Pleasant Genius
Basically yes. The execution units would starve, for example, if your cache misses that hit main RAM get more and more costly the more you increase the CPU clock frequency keeping the rest the same.
Jaguar has incredibly low power consumption. That change would be negligible.
Could be. I'm pretty sure that the CPU wasn't 100% final at the conference since they didn't give out any hard numbers on it, aside from number of cores.
Entirely possible.
Panajev2001a
GAF's Pleasant Genius
As I said, if they need to raise the voltage to increase clock rate the increase in power consumption will grow quadratically compared to the change in voltage. So, yes, if the change in voltage is negligent or none then you have less problems, but the power consumption will still rise, just not as badly as with core voltage changes.
amstradcpc
Member
I thought that too. Besides it seems Jaguar stock is now 1,8 GHz. 1,6 is the downclocked version for low power devices.
fvng
Member
Excellent point. For example, it's entirely possible that they had been originally designing an internal PSU but increasing the ram was the straw that broke the camel's back on that design chioce. At that point the cooling dynamics of the case would change dramatically, opening up new options.
zomgbbqftw
Banned
Ultimate troll from yesteryear. Trolled anything to do with non-MS companies. Was on the side of HD DVD and kept spouting that the 360 would come with HD DVD to kill Blu-ray etc...
Weirdly, he always turns up when something is going badly for MS.
Not even close. i7 smokes Jaguar. However, CPUs are becoming less and less important for games in recent years. Most physics calculations will be handled on the PS4 GPU and audio rendering will be done on it's own chip. The CPU will mostly be doing AI calculations.
HocusPocus
Member
Seems to be a lot of changes to bump up the power of this console if true. Makes you wonder why ? Maybe Microsoft has a beast of a console that they found out about or they know they have to separate themselves enough to warrant microsofts cost advantage that is assumed if a lower power solution.
LiquidMetal14
hide your water-based mammals
This is why the high specs on PC these days will help out tremendously as these new platforms will up the minimum spec and push PC's more. It's exciting for PC as we don't have to put up with lower res textures (not as much) among other things that come from focusing on consoles.
fvng
Member
Christ, that's pathetic. Thanks for the info
Meanwhile most of the things he says contradict themselves, or the quotes don't agree with him or he simply doesn't make any fucking sense.
-Amon-
Member
True and at the time sad that pc owners have to wait for a new console generation to have better games on their systems.
amstradcpc
Member
Well, to be fair Jaguar is the best cpu AMD has created since AMD K7, at least the most focused. Its performance/tdp ratio is outstanding. Upping it to 2 Ghz get it nearer to 3 full desktop cores ( I won´t say 4 because of the fpus being 128 bits instead of 256 ).
Miles Quaritch
Member
Sure, this is as believable as the claim that the CPU in next Xbox is running at double the speed.
The i7 would have 3.5x the single threaded performance of the Jaguar and just under 2x the multi-threaded performance. Like Robo said... smoked.
2Ghz * 8 Cores = 16Kaz!
Not sure I would say smoked. It totally depends on how the program is designed were not talking about straight PC gaming here where using 4 cores isn't even the norm yet.
Splitting the load across 8 jaguars would be more efficient in the right hands.
Maybe, but if Sony have the capability to improve the hardware in any way, why wouldn't they, regardless of what the competition are doing? More likely they are continuing to evolve the specs as they complete the hardware. The point made above about alterations to power and cooling might be an excellent reason to alter the design, and for the better if they can.
Does't work like that, becase you would have to write everything to work in synchronous parallel processing. Which is a pain. Easier to off load certain computations to other cpus/gpu.
But in a sense having more cores is a way to increase processing without increasing the clock speed. It just all depends on how you code the games really.
Deadmeat has been around much much much longer than that. i think he was on GAF in 1998 and certainly in 2000 being anti-Sony and very pro Sega. some very funny history there.
systemfehler
Member
Annoying but accepted behavior.
I guess Sony found room in their TDP budget to upgrade the speed a little bit - after all those Jaguar cores consume next to no power (well this sadly also scales to computational purposes) so I guess power consumption will probably scale linear. So maybe from 30W to 37.5W - if they managed to raise the clock without raising the core voltage.
Intel's CPUs dump on AMD's. It doesn't really matter which way you slice it.
Shalashaska161
Member
Man the the PS4 is going to melt faces. Literally, it's gonna run so hot it's actually going to be able to melt faces.
Yeah.. my first thoughts. People seem to be eating this sites rumor up though.
SniperHunter
Banned
he goes way back. He used to troll Sony on multiple forums as far back as 1998 or 1999. He was a huge Sega fan
The Main Event
Member
$599.99?
Yeah, but with the low TDP, Jaguar cores are definitely the right choice in a console environment. Intel isn't even close to matching the performance per watt on this level.
lol That made me chuckle.
Theonik
Member
If anything, some processor tasks don't lend themselves that well to parallelism or at least don't scale in an entirely linear fashion, so it should be that an Intel CPU with less cores, but higher clocks and higher performance per clock will almost always perform better.
(given this data at least)
It said nothing about the CPU other than it being AMD and 8 cores.
Upping the clock speed pretty much costs nothing.
Zombie James
Banned
Going from 1.6Ghz and 4GB of memory to 2GHz and 8GB is pretty substantial, imho. It's crazy to think of how much better post-launch titles will look.
No, it just said it was an 8 core Jaguar, no clock speed or even FLOPs data given, while the GPU did at least list 1.84TFLOPs.
Right, but there is no weakest link in the chain that applies to all programs. Some sections of the code are working on cached data, those get a linear speedup from clock rate. The better optimized a piece of code is, the more the clock rate matters.
Salacious Crumb
Junior Member
I'm gonna go with the assumption that this rumor is bullshit, especially considering the source.
I'd rather be pleasantly surprised than disappointed.
I'd rather be pleasantly surprised than disappointed.
... and also that specifications are subject to change without notice. I'm not convinced this story is accurate, but it is probably plausible.
They should be able to pull off <200W when it's all said and done. Hopefully closer to 150W, but I feeling it will be slightly over that at max TDP.
EDIT: Of course I'm making the mistake of not factoring in the benefit the APU might bring to power savings. 7970m is 100W TDP, but PS4s is slightly downclocked plus other savings. I can't see the Jaguars using more than 35W. GDDR5 will use up a little amount along with the secondary processing chips. It could actually be around 150W or slightly less.
Whatever, just as long as they keep those 8 cores and GPU from becoming 8 coals and a furnace, I'd be happy. If true, of course.
Although, this gen raised the bar - for console thermal related issues - so high that I probably shouldn't have to worry about it ever being topped again.
Although, this gen raised the bar - for console thermal related issues - so high that I probably shouldn't have to worry about it ever being topped again.
Even first party did not know about 8 GB. A member from the ICE team tweeted stating that he was pleasantly surprised when Cerny announced that they are going for 8GB. He had a hunch that Sony might upgrade but was not sure.