HoloDust said:
dahuman said:
HoloDust said:
I think it is a fair comparison.
PS4's GPU has slightly better GPU than 7850, pixell/texel fill rates are similar to 7850, but it has more TFLOPS and higher bandwidth.
XOne's GPU performs close to 7770, although it has 2 more CUs, but at lower clock rate - it actually has slightly less TFLOPS than 7770.
Both GPU's have their own customizations, but comparison of vanilla 7850 and 7770 is pretty good starting point.
Unless, of course, MS surprises us all and it's something more similar to 7790 inside.
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The actual big difference comes from the memory bandwidth though, 7770 is a 128bit part while the 7850 is 256bit, that's where the performance would change in the Xbox One, make no mistake, I don't think the One is faster than the PS4 at all, I'm just saying that the 7770 is serverly gimped ^_^; The 7850 is very close to what the PS4 has though, even down to the amount of bandwidth for GPU tasks as the rest are needed by the CPU.
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7770 has 72GB/s, XOne's main memory is 68.3GB/s - additional XOne's enhancements will certainly boost performance of its GPU, but so will additional enhancements in PS4's GPU. Hence, I think 7850vs7770 comparison is fair starting point.
http://www.gamasutra.com/view/feature/191007/inside_the_playstation_4_with_mark_.php?page=2
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The problem with your number is that you are not taking in account of the eSRAM(very low latency) which has a higher bandwidth than the gimp one in the 7770 on top of other possible enhancements and that the DDR3 has a lower latency than GDDR5. I'm just trying to be fair. :P
