PCTuning fórum

Yes, there are OpenGL wrappers available for the PlayStation 3, but their performance is considerably worse than PSGL, because OpenGL isn’t suited to the PS3’s hardware very well (just like how you can run linux on it, but the Cell is very much underused by linux applications, and you end up with a very slow system, with the exception of custom PS3 applications).

AMD has their HSA/HUMA architecture coming with Kaveri in short order but XBO is based on a design ~1+ generations older so no advanced AMD CPU/GPU coherency here

There is obviously the Radeon GPU, something that sources say is somewhere between an HD6000 and HD7000 in capabilities and a fraction behind what Sony has in the PS4.

This embedded DRAM is however not a cache in the traditional PC sense, not even close

In the end what do we have? A 5+ billion transistor SoC built on TSMC’s 28nm HP process. The 361mm^2 die size, ~381mm^2 counting scribe area, lines up nicely with similar transistor count AMD GPUs made on the same process. Unfortunately no TDP was disclosed or even hinted at. All the caches on the die total up to about 47MB so that will dominate the SoC’s area, about half the die according to the architect, much of which is distributed to the various units.

Then there are the GPUs themselves, the Achilles heel of the XBox One. While there is nothing wrong with them per se, they are a slightly older revision than used in the PS4 but the differences are small enough to be ignorable. What does matter is that the PS4 has about 50% more units at roughly the same clocks, 1152 at ~800MHz vs 768 at 853MHz, a massive difference. Couple this with the vastly more user-friendly 8GB GDDR5 memory design and you have a clean kill for Sony on performance.

Microsoft made a really impressive SoC that is a multimedia monster with a bit of gaming ability, technically speaking it is quite impressive that they pulled it off. Not to take anything away from the hardware designers but Microsoft management simply aimed wrong. Sony made a gaming machine, Microsoft did not. Sony made a clean design for coders, Microsoft did not. Microsoft made a complex technical masterpiece that is in a no-mans land between a far <$100 Android media center and the PS4. Sony just did right for gamers and won the battle.

But it looks like we all could have been fooled, myself included. It appears Microsoft is using a multi-module, stacked design in the Xbox One. Underneath that modified Radeon HD 6670 GPU, lies a 175 mm^2 space for something. That something is presumed to be a Volcanic Islands based AMD with a 22nm SOI design featuring 2304 to 2560 stream processors.