I experience half the FPS of one card with a crossfire R9 290 setup.

[JaredzzC]

Hi, Everyone.

When I am in crossfire mode, in the games I play, I experience roughly half the FPS from one card...

E.g. Crysis 3 one card: 80-100fps
two cards: 40-60fps
Battlefield 3 one card: 80+fps
two cards: ?40fps

I've tried drivers 14.6 and 14.7
I've tried restarting the computer many times
I've tried reseating the cards
I've also tried swapping the cards around so that each card has had some time in the primary slot, and each card works fine on its own.

i5-2500 @ 3.3GHz
12GB @ 1333MHz
XFX 850W Silver
Corsair H55 Liquid Cooling
2x R9 290 XFX DD
ASRock Z77 Extreme 4
Resolution: 1920x1080

Any suggestions?

Thanks.

Regards,
Jared.

 

[Ryan Reynolds]

weird. try to re install the drivers. also check to make sure that the crossfire cable is connected correctly. also it may depend on the game but try to change some settings to a low setting then play it for one minute then go and turn the settings back to normal that may work. i am suggesting that because i upgraded to a gtx 780 and a new monitor in 1080p and i was getting 10 fps less in just cause 2 multi player mod so i did that and that worked for me. hope this helps. good luck

 

[Cryoburn101]

Check out --> http://www.tomshardware.co.uk/forum/245454-33-crossfire-faqs
Crossfire with the R9 290 does not need a crossfire cable. Make sure you have the most recent drivers stable drivers installed.
What are the temps of the two cards? Because if the cards are too close to each other, one may be blocking airflow to the other. Maybe causing thermal throttling.

 

[JaredzzC]

Check out --> http://www.tomshardware.co.uk/forum/245454-33-crossfire-faqs
Crossfire with the R9 290 does not need a crossfire cable. Make sure you have the most recent drivers stable drivers installed.
What are the temps of the two cards? Because if the cards are too close to each other, one may be blocking airflow to the other. Maybe causing thermal throttling.

14.6 seem to be the latest stable drivers, so I have them installed. There were too many problems with 14.7 (I made sure I uninstalled everything before installing new drivers)
As far as the temperatures go, they seem ot be fine; they don't seem to go above 75degrees.

 

[Amir Fisher]

Same :|