Technical breakdown on Next-Gen Game Consoles GPU

[biglittlesps]

fallen said:
Also, not sure why the OP calls the PS4 GPU between 7870 and 7850, it's really much much closer to a 7850.

Just one example:

7850=1.76 TF
PS4 GPU=1.84 TF
7870=2.56 TF

You can see PS4 is MUCH closer to the 7850. 7850 also has 32 ROPs like PS4, so I dont see any major spec deviation. PS4 has 18 CU's vs 16 CU's of 7850, but the 7850 is clocked 860 vs 800 for the PS4 negating most of the difference. For example PS4 has 72 TMU's vs 64 for the 7850, but once you adjust for the higher clock 7850 has ~69 TMU's relative to PS4's clockspeed. Similarly 7850's 32 ROP's will process slightly faster than PS4's since it's clocked higher.

So it's best to call PS4 GPU basically a 7850 and XBO basically a 7770 imo. Bringing 7870 into it skews things. XBO GPU is a very little stronger than 7770 just as PS4 GPU is a very little stronger than a 7850.

There is one major exception and it falls in favor of the XBO, the 7770 only sets up one triangle per clock, The XBO GPU, PS4 GPU, and 7850 (and all higher AMD GPUs) set up two triangles per clock. A pretty major plus of the XBO GPU over a 7770.

But, PS4 GPU has some modifications so we can consider to place it between 7850 and 7870.