Crossfire reduced perf

[pcm81]

Hi all,
I have a rather interesting problem.
I reinstalled windows, added water cooling to my 980x and am running 3DMVantage BMs. I tried catalist 11.4 and 11.2, I have the cross-fire enabled in catalist, and have PnP OS enabled in BIOS. In 3dMVantage and 3DM11 i get the same scores as I was getting with 1 card and no CF enabled. When I run BOINC client, which uses GPUs separately I see load on all 4 GPUs as should be. All temps are normal 70C on CPU and 50-60C on GPUs under load. Running BOINC I see same power draw on UPS as I did before.

I am getting P27K in 3dMVantage and I do have CF enabled in Catalyst. I was getting P42K before adding water on CPU and reinstalling windows.

X3.7K in 3DM11, with CF enabled, and i was getting X5.2k before. was getting 3.2-3.7k with 1 card in 3dm111 before windows reinstall.

Any suggestions short of
>format c:
start over


EDIT:
I am using the driver 8.840.3.0
and windows experience indes gives me a 5.5 for 3d graphics.

Clearly a software problem, since BOINC uses all 4 cores and 5.5 is way too low even if 3/4 cores were fried, which they are not...
Any suggestions?

 

[badb0y]

Uninstall all video drivers
Reboot in safe mode
Run driversweeper
Reboot into Windows and install 11.4s again

Try using them one at a time

Try swapping the slots

Try changing the Crossfire bridge

All I got right now.

 

[notty22]

Did you grab and install the separate AMD crossfire profile download ?
ATI Catalyst™ Application Profiles


http://sites.amd.com/us/game/downloads/Pages/crossfirex-app-profiles.aspx

 

[BTRY B 529th FA BN]

I know 1000w would be enough, but are the rails supplying enough Amps? Could that be it?