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Stock Phenom II 965=GTX 580 SLI bottleneck?

post #1 of 56
Thread Starter 
Will a stock phenom II 965 bottleneck 2 GTX 580's?
Buddy of mine that i built a computer for is currently running a 580 with his 965.
He wants to get a second 580 but i think he will be bottlenecked and won't see a huge performance increase like he's expecting.
I'm thinking a sandy bridge 2500k @ 4.0Ghz should net him more performance increase than a second 580 but I'm just guessing.
Am I wrong?
proof.gif
post #2 of 56
If he has DDR3 memory, and his cpu overclocked to 3.5 ghz +, there should be no bottleneck.
post #3 of 56
Yes, I believe so, from what i remember a Amd 6 core at 4.2GHZ was bottlenecking 580 SLI, however I'm not entirely sure and I'll let someone who knows for sure answer, please don't flame me smile.gif.
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post #4 of 56
Thread Starter 
Quote:
Originally Posted by Capwn;12560993 
If he has DDR3 memory, and his cpu overclocked to 3.5 ghz +, there should be no bottleneck.

yeah he has some CL9 1600 DDR3 ram
a 100 Mhz increase is really all it takes?
post #5 of 56
Quote:
Originally Posted by AK-47;12561064 
yeah he has some CL9 1600 DDR3 ram
a 100 Mhz increase is really all it takes?

Well the faster the better, thats a given.
But there should be little to no bottleneck.
post #6 of 56
Quote:
Originally Posted by Capwn;12561112 
Well the faster the better, thats a given.
But there should be little to no bottleneck.

IDK cap, that's a lot of horsepower, he will for sure suffer in overall scores in 3D mark tests, when he does this I'd like to see benches to see where his GPU score is at.
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post #7 of 56
Major unless its Metro 2033 and resolutions under 1440p.
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post #8 of 56
965's can be clocked pretty high...if not, set every graphics option as high as it will go to put more load on the 580's and less on the CPU.
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post #9 of 56
compare GPU and CPU % load when playing preferred game. If CPU is at 100% then it's the cpu that's not capable; and the same goes for gpu. Good Luck!
    
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post #10 of 56
There is going to be a huge bottleneck at stock. With some moderate overclocking (3.6ghz+ is easily attainable even on C2) it should be lessened but still prevalent.

Just look how much a 965 sucks with a single 5870 in some of the games. Keep in mind a 580 is a good bit faster than a 5870, so running two of them is paired with a 965 just isn't going to cut it.
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