Crossfire 7970 core clock issue

dave1642

Honorable
Mar 5, 2013
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10,690
When I go to load Battlefield 3, the 2nd gpu spins up and is clearly being used but;
When I minimize to look at catalyst control centers gpu stats it says the gpu clock is at 300mhz and the memory clock is at 150mhz.

This is odd because I used this program to run both 7970's @ 1150mhz.


Case: Corsair 750d
Processor: AMD FX 8320 @ 4.5ghz
Cooler: Corsair h100i
Motherboard: Crosshair v formula z
ram: corsair dominator platinum 2133mh 8gb
gpu1:gigabyte 7970 ghz edition
gpu2: msi 2pmd3gd5

I also have the power to both cards set to +10 in catalyst control center.

current beta drivers. (I used 13.10 also, but get better performance with the beta getting around 120fps in battlefield 3).

I read somewhere that the 2nd gpu is only fully utilized when in full screen mode, (while gaming), but when I alt-tab to control center it still reads 300mhz on the core clock and 150mhz memory clock).
 


PC sensors are notoriously unreliable. You should pay attention to the performance. If it was truly running at 300Mhz while playing BF3 it would be stuttering like mad. Compare it with crossfire on and off.
 

dave1642

Honorable
Mar 5, 2013
101
0
10,690
Ok, so everything is functioning properly...I think.
My core/memory clock both jump to the appropriate place - on both cards.
However, the second gpu shows to be around 45% usage...
the game runs perfectly though.
And both gpu's heat up the way they should.