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R9 280x Crossfire Problem

post #1 of 7
Thread Starter 
So I have two R9 280xs and when Crossfire is on, the FPS is lower. Newest drivers, I deleted ALL remnants of previous drivers, CF bridge plugged in, both cards have power, CF enabled in CCC. But it doesn't work?
NRYbZkc.png
CF on the left, non CF on the right. If you guys could get this working for me, that would be super swell.
post #2 of 7
What games have you tested?
Also, your CPU might be bottlenecking you in certain games as these cards feed a lot of data to the CPU.
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X79-GCN
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Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
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EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
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post #3 of 7
Thread Starter 
BF3, FC2, and Insurgency. CPU is at stock... That could be it but its like 20% lower fps if not more.
post #4 of 7
Quote:
Originally Posted by dudemanppl View Post

BF3, FC2, and Insurgency. CPU is at stock... That could be it but its like 20% lower fps if not more.

BF3 MP? can't leave that cpu at stock. oh noes!

even with a single 280X.

This was what happened with my setup and my cpu was oc'ed to 4.5GHz . . .




100% on all cores.
Edited by rdr09 - 4/4/14 at 12:27pm
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post #5 of 7
dude, i am not saying that could be the only culprit but it could be driver as well. could be your psu. if you see shilka (psu guryu here in ocn), he might be able to tell you about the TT 700W if it is still your psu.
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post #6 of 7
Might be a bug in 14.3? Why not try 13.12? See if it's better.
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post #7 of 7
Thread Starter 
I'm running 13.12. redface.gif( I'll try OCing it, but Insurgency is a Source engined game, shouldn't be running that terribly.
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