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How badly does my Processor bottleneck my gpu

post #1 of 24
Thread Starter 
i have a Amd phenom X6 1090t at 4.2ghz with 2 6970s xfired 16x by 16x and im getting decent scores on benchmarks but as i compare with intels at 4ghz they are getting an assload more frames so how badly does this phenom bottleneck?
post #2 of 24
Quote:
Originally Posted by MahnaMahna View Post
i have a Amd phenom X6 1090t at 4.2ghz with 2 6970s xfired 16x by 16x and im getting decent scores on benchmarks but as i compare with intels at 4ghz they are getting an assload more frames so how badly does this phenom bottleneck?
If you don't have it at 2.8GHz NB, then that's the main problem. Try getting 2600-3000MHz CPU-NB frequency.
    
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post #3 of 24
Thread Starter 
kk i will check it out real quick
post #4 of 24
Thread Starter 
im at 2.8ghz nb and its alittle faster but not much i cant get to 3ghz with this oc but how much would that improve?
post #5 of 24
what games are you comparing the intel base vs the amd base?
post #6 of 24
Thread Starter 
right now im just comparing unigine heaven,3dmark11,and dirt2
post #7 of 24
Quote:
Originally Posted by MahnaMahna View Post
kk i will check it out real quick
If it's at 2000MHz, then make sure to increase CPU-NB (IMC) voltage to 1.3V and then get it to 2800MHz. Double check and make sure you manually configure your RAM correctly.

If it's stable in Prime95 for some hours, leave it there. If it's not, but you can get stability if you lower your CPU frequency to 4GHz, do it. A CPU-NB over-clock can bring you over 10+ more FPS in a game, especially if you CrossFire. A 200MHz increase will get you 1 FPS or less.
    
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post #8 of 24
I remember seeing a thread where a guy upgraded from an x6 to a sandy bridge processor and he said that his frames went up quite a bit when playing cpu-intensive games, like BFBC2. IIRC, he had a 6950 X-fire. Idk what his NB frequency was tho.

http://www.overclock.net/amd-cpus/97...1055t-can.html
post #9 of 24
Quote:
Originally Posted by MahnaMahna View Post
im at 2.8ghz nb and its alittle faster but not much i cant get to 3ghz with this oc but how much would that improve?
2800MHz NB is fine. Test for the differences in games between that and 2000MHz and you'll definitely see some differences. Phenoms benefit more in games from CPU-NB over-clocks.
    
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post #10 of 24
Run a benchmark @ 2800mhz NB and 4ghz cpu clock. Run the same one again with the cpu at 4.25 ghz and 2800 NB, If your frames go up considerably and not just random 1 or 1.5 fps you're bottle necked.

*Edit*

For example I can run AVP benchmark at 3.2ghz and then again at 4.5ghz. I get exactly the same fps, the only thing that brings it up is a GPU overclock. So we can see that the processor clearly isnt bottle necking my card.
Edited by Vap0r87 - 4/23/11 at 8:38pm
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