Not sure if my crossfired AMD 6870s are working as they should

Hi

I recently purchased a second Sapphire 6870 to add to my original Sapphire 6870. I have set up the cards in my motherboard properly (I think), the original card in a x16 PCI-e slot and the second in what I believe is a x4 PCI-e slot. I have connected the CrossfireX bridge cable thing, and powered them properly with an Antec 750W PSU.

I removed the original drivers and installed the ATI catalyst drivers including the CrossfireX Application Profiles, and windows detected the second card (both are visible in device manager). CCC also detected it and now allows me to check and uncheck "Enable CrossfireX", and to view the CrossfireX diagnostics. However, the diagnostics page is blank and clicking Identify GPU does nothing obvious, other than putting a big "1" on my single monitor.

Playing Crisis 1 used to be around 35 FPS average and I see no performance improvements from adding the second card, however other games do see significant performance improvements.

MOBO - GA-P55-USB3
PSU - Antec 750W
CPU - i5 760 (sometimes overclocked to 3.7Ghz, sometimes not)

My question is how will I tell if crossfire is actually working because the diagnostics page is blank (although I think it should be unless there are errors) and when running games the first GPU heats up whereas the second one does not. Also, the second GPU shows 0% activity.

Also I have been having issues with the display driver crashing and recovering.

Any suggestions?

are they both showing in device manager..?


don't know which driver you have installed
I was getting blackscreens and GFX recovery messages with the latest 11.10 test driver
I have now reverted to 11.9 - which is stable..

I'd be inclined to use the 11.9 driver from sapphire's own site (check if 32/64 bit version..)
http://www.sapphiretech.com/presenta...n=&lid=1&leg=0#

they are pretty good on the assistance side of things
check what the serial numbers of your GFX cards are..
in case they are mis-matched in some way