i7 3770k Cpu Bottleneck?

First post been a long time forum lurker.
Computer Build:
CPU:i7 3770k at 4.1 ghz with H100 cooler
Ram:G-skill Trident-X 2400mhz 16gb (2x8gb)
GPU:Evga gtx 670 FTW+ 4gb in 3 way sli
1200w psu
Benq xl2420t 120hz monitor 1920x1080
Windows 7 Ultimate x64

Ive been getting low gpu usage (between 60-70%) and frame rates all over the place in most games after adding the third 670. Ive tried overclocking the cpu more but I get bsod with anything over 4.1ghz. Would this indicate a cpu bottleneck?
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  1. I don't think so. A bottle neck doesn't mean fps fluctuations. Bottlenecks are stagnant , meaning your frames will just hit a wall. My first guess, is your Drivers or maybe the third GPU is faulty?

    Either way, to figure it out, it's no use looking at the GPU usage... at 1080p you are never going to stress a 670 tri-sli setup. Another thing to check is your PSU, sometimes too much up and downs is heat/power related, aside from drivers or games just not being good with the sli setup.
  2. nah not a cpu bottleneck. the 3770k can handle any game. More likely to be a bad gpu. Did you try running each gpu individually and see if all of them are working? Also what mobo are you using?
  3. I would agree with the above mentioned something may be wrong but at 1080p no where will a tri sli 670 setup be fully used. Run a higher resolution and of course do the above and test each card separately
  4. Forgot to put the motherboard. Its the gigabyte g1 sniper 3. I've tried all gpus independently and they work fine. I'm using the latest 314.22 drivers and have set prefer max performance in the Nvidia control panel. Still having problems with the gpu usage and fps being unstable. Temps are also pretty good with the cards never going above 65c in my Nzxt Phantom 820 case.
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