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post #11 of 16
6 series has 4 tess cores per GPU unit. 5 series has 1 tess core per GPU unit.
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post #12 of 16
The 68**s are running at 1ghz too.
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post #13 of 16
Thread Starter 
So its 8 tess cores vs 3?

Which explains the huge difference in fps despite the higher amount of shaders?


Sorry I have no clue about ATI cards
    
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post #14 of 16
first of all, we dont know anything about the cpu, cos anything for 5970+5870 is a bottleneck till its not 4ghz (a good amd cpu, not talking about dual k8)

i'd think that it needs at least 4.5 to stretch its legs

now when there's too much gpu power thundering upon a cpu, it actually underperforms
so if that cpu is not oc'd to good levels, the setup does not perform good
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post #15 of 16
The first test is 2 barts GPU at 1000/1200 with a Phenom II X6, OC'ed pretty high too, not CFX, and the second is a 5970 running at 960/1250 with a 5850 at 1006/1304 in a i7-930 at 4.3GHz. Still, 2 barts at that speed with a fast CPU get more FPS in a DX11 title than any 3-way CF of 58XX series cards due to what many people above have already said, better scalability, and tesselation improvements, amongst other. No real surprise here. In other games you'll probably see other outcomes. Driver support also affects the results pretty much.
Edited by matroska - 4/5/11 at 9:58am
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post #16 of 16
Thread Starter 
My bad
    
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