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why is my crossfire not scaling

post #1 of 7
Thread Starter 
hello i just set up my 4890 crossfire on my asus m2r32-mvp mobo with 4 gigs of ram a 1000 watt psu and a phenom 2 x4 920 at 2.8 stock any how i have crossfire turned on in CCC and in game and driver settings are at stock and my screen res in game is 1280x720 i get at max 75 frames in the variable resident evil 5 benchie with or with out crossfire enables in game so what gives will overclocking my cpu to 3.0 help so wether i have crossfire on or off nothing is different in the framrate department my os is xp pro 64 bit and dx 9
Edited by kaitlin4599 - 11/17/13 at 9:49pm
post #2 of 7
What are your system configuration ?? Also, did you check with Afterburner or GPU-z to see whether the second core does get load ??
post #3 of 7
Thread Starter 
second gpu in gpuz shows no load what do i do now does it matter that i have 2 crossfire cables plugged in my card came with 2 crossfire slots so i bought 2 cables
Edited by kaitlin4599 - 11/17/13 at 9:59pm
post #4 of 7
Does the first card have 99% load, and are your clocks at full 3D speeds?
post #5 of 7
Thread Starter 
1 card is at stock 875 gpu clock the other is at stock 850 gpu clock
post #6 of 7
Quote:
Originally Posted by kaitlin4599 View Post

1 card is at stock 875 gpu clock the other is at stock 850 gpu clock

But what about GPU load or percent usage on the first card? Typically a CPU bottleneck wouldn't completely ignore the second card, it would have low usage but still above 0%. On the other hand, if the CPU bottleneck is bad enough, you won't be getting full usage even n the first card. Honestly 75fps at 720p seems a bit low to me even if the game is only using one 4890.

What display are you using? I assume you don't have v-sync enabled because the 75fps result but some displays support 75hz at lower resolution.

Are your 4890s different manufacturers or different models? I noticed the difference in stock clock speed. Different clocked cards should work in theory but it's usually best to run with the same BIOS on each.

Finally, is this the only game you've experienced the issue in?
post #7 of 7
Thread Starter 
both 4890's are from xfx i was able to get average 94 fps in resident evil 5 variable benchie forgot i had anti aliasing set to 8 x so i lowered it to 2 x and game ran better i also overclocked the lower speed gpu to the stock speed of my other gpu
Edited by kaitlin4599 - 11/17/13 at 10:51pm
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