The Following is From an Article on Geek.com
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With news that Sony may be officially revealing the next Playstation in a little over two weeks at a February 20 event, it would behoove Microsoft to make sure Sony doesn’t totally dominate the news cycle. And what better way to do that than release some information on the next Xbox? Whether or not Microsoft has actually leaked Xbox 720 specs, some official-looking Xbox 720 GPU specs have surfaces and been and published for the world to see.
VGLeaks notes that the reportedly leaked specs represent the hardware unencumbered by running actual code, so performance can’t quite be judged on the hardware specs alone. However, we would like to note that the following specs cannot be considered official until Microsoft announces if they are or aren’t.
Out of the very detailed specs contained in the report, the more notable ones claim that the GPU, codenamed Durango, has a clock rate of 800MHz, which lines up with a previous rumor regarding one of the Xbox 720's SoCs. The GPU is said to sport 12 shader cores, each of which contains 64KB of local shared memory and a 64-way L1 cache of 16KB, and the GPU will also contain 64KB of global shared memory. The shader core will contain 4 SIMDs, which will employ an instruction set that helps the shaders preserve processing power when operating on a smaller number of components at a time.
The GPU will have a run capability of 1.2Tflops, which also lines up with one of the previous rumors. The peak throughput from the main RAM is said to be 68GB/s, while the throughput from the 32MB ESRAM is said to be 102.4GB/s. Compared to the Xbox 360′s EDRAM, the ESRAM is capable of texturing, and rendering to surfaces in the main RAM, among other tasks.
The Durango GPU will reportedly be capable of 2x, 4x, and 8x multisample anti-aliasing (MSAA), as well as a modified type of MSAA, compressed AA. Essentially, compressed AA combines the benefits of both high MSAA and the lesser space requirements of lower MSAA.
If the leak turns out to be spot on, a couple areas that will surely get a rise from hardware-focused fans will be the 1.2Tflops (compared to the PlayStation 4′s rumored 1.8Tflops) and lack of VRAM (which the ESRAM would help alleviate). Keep in mind, though, that the specs — which you can view in their entirety ovr on VGleaks — aren’t necessarily accurate at all, and should be taken with a grain of salt until Microsoft announces them itself.