GPU Usage Randomly Dropping (Please Help!)

[tuberolector]

When I am playing games, for some reason, after about a minute of playing, the GPU usage will drop from 85%-100% to 50%-60%. This causes a significant drop in the FPS, making some games unplayable. It is not limited to 1 or 2 games, it happens in every one I've tried. When playing with the reduced GPU usage, sometimes the usage will spike back up to normal levels, but it is only for a moment, as it drops back down right after. 

 

Thinking that this might actually be an issue with the games, today I picked up a second Radeon HD 7950 to use in Crossfire with the one I already had. When using the cards in Crossfire, the GPU usage will not even go above 40%.

 

This is really bothering me and making me think that I will have to waste more money on completely different GPUs. Any help would be greatly appreciated!

[jslane21]

What are your system specs, powersupply included also please! 

[Faceman]

Could be the VRMs on the 7950?  What kind of temps are you getting?

[Dazza477]

This is usually due to a bottleneck. If your CPU is at 100% and the GPU isn't, then your CPU isn't man enough for the job.

[tuberolector]

What are your system specs, powersupply included also please! 

CPU: Intel Core i7-4790k

GPU: Sapphire Radeon HD 7950 (x2)

PSU: EVGA Supernova 850 B2

 

Could be the VRMs on the 7950?  What kind of temps are you getting?

The hotter of the 2 cards is reaching 76 C

 

This is usually due to a bottleneck. If your CPU is at 100% and the GPU isn't, then your CPU isn't man enough for the job.

The CPU is not hitting 100%