CrossFire Bottleneck issues?

Kurt Muehlbauer

Honorable
Dec 6, 2013
4
0
10,510
Little background on myself:
- Been building computers and over clocking for 10 years
- Feel I have a strong knowledge of computers and hardware (No Expert)

Computer specs:
i5-2500k (OCed to 4.6ghz stable)
Extreme P67 MB
GPUS: HD 7950 XFX Core Edition and XFX 7950 Black Edition
Ram: 16gb
PSU: Crosairs 850wt

My issue is as follows and I am running out of ideas to try. I believe the CPU is the bottleneck in my system, but I have yet to read a post that everyone seems to agree on how to find the bottleneck.

The benchmark is Battlefield 4:
One single HD7950 100% GPU load on ultra was getting 40-70 FPS
Crossfire HD7950s: GPU 1 60% load GPU 2 50% load getting 50-85 FPS
(there are spikes over over 85, but that is the average usually closer to 65FPS)

On both the 1 GPU used or 2 GPU used my CPU load is 100%

____________________________________________________________________________

While the performance is amazing compared to my 560ti I had originally, I feel this setup should be pulling better performance. Also the low load on the GPUs in Crossfire is concerning to me, if they were working at 100% obviously performance would be a ton better.

I will be trying Eyefinity today and see what the GPU load will be, I have seen through posts here that the load will go up.

I hope I included enough information, if there is anything else you pros need let me know.

Regards,

Kurt
 

Kurt Muehlbauer

Honorable
Dec 6, 2013
4
0
10,510


Getting same result it is not setup on 1080p either, that is what I am going to try right now though and see what happens.

EDIT: FPS dropped to sub 50 during game play on HD 1080p.. GPU1 70% GPU2 60% So the Load stayed the same from HD to non HD