Basically, if the ESram is the frame buffer, it needs to store all the pixels in the frame. At 1080p 4xmsaa and 4 bit coulour depth, the rough amount of memory taken up would require 2x4x4=32 mb, which is just about the size of the esram. Can't do much more than that. Tiling would burn up bandwidth to the main memory, so it is best to avoid it if possible.
Based on what they wrote, it appears that the GPU can access data from esram and main ram at the same time. So in that case, the bandwidths can be combined. This is still limited to how fast something different can be put into esram to make the bandwidth more useful.
that sounds like a nice idea that is far more complicated and compromised in practice. kinda like the original promise of the 360's eDRAM.
it's very hard to believe this thing will be able to match the PS4, but i guess we'll see. it'll certainly be cheaper to manufacture.
- at peak performance, the GPU can effectively issue 1.2 trillion floating-point operations per second
He was probably talking about AMD flops vs Nvidia flops. Which is a difference in how they are counted. These parts are rumored to both be AMD so it would be a valid comparison.
Anyway, I don't think 1.2 TFLOP/s is impressive even with "special sauce"
Also I wonder if the'll switch to HDMI 1.4b or 2.0 before this goes into production.
6x BD drive is fantastic.
ESRAM is expensive, the total cost for both Orbis and Durango will be around the same.This. It should be a good degree cheaper. DDR3 is peanuts, whilst GDDR5 is expensive. Having said that, if Microsoft bundle in Kinect 2.0 or anything like that, things could get pricey again for the consumer.
The HDMI-in, to me, suggests a pass-through for cable. I'm not sure exactly how it'd work, but I imagine it'll use HDMI-CEC so you can control your cable box from your console. MS tried to actually provide the TV themselves with the IPTV thing, and that failed to get off the ground because the networks like the current arrangement more than what MS was offering, so the next best thing is to run the cable TV through the Xbox.
I don't know how much info or interactivity the 360 can glean from the cable box over HDMI, however, so it may be a bit of a hodge podge of interactivity, and for that reason I don't know how compelling this function will be: you'll still need the cable box, but it may be a neat feature for people who already have a reason to own the next Xbox.
Considering that the 360 had a better GPU than any PC GPU at launch this is incredibly disappointing, even the GTX 560 Ti ($150) perform better than that.
Yes, it will be enough for 1080p but only if you are rendering one buffer at a time, and thus deferred rendering it's not going to work well.
I don't see how you'd get parallel bandwidth. Even if the move chip can move data while the GPU is pulling data in, aren't most steps depending on the outcome of a previous step?
This. It should be a good degree cheaper. DDR3 is peanuts, whilst GDDR5 is expensive. Having said that, if Microsoft bundle in Kinect 2.0 or anything like that, things could get pricey again for the consumer.
This isn't a PC so the number doesn't mean the same thing. Its obvious that MS isn't building for raw power, but efficiency. They are focusing on general computing and parallel programming.
Nothing new here and move engine sounds like the joke at B3D about the blitter unit. Nothing on the specific secret sause or what mods to the jaguar there is. If this is really it the PS4 will be much more powerful. With the extra compute unit to do the heavy FPU lifting to assist its 8 jaguar processors. Then only 32meg of esram is to small should be 64meg. Looks like they had to cut a lot to include kinect in every box and make it a SOC. It will be interesting if there is a backlash of core gamer if these specs are true. Got a gimped system to include the kinect.