SLI and Crossfire Performance Poll
 

Firstly no fanboy/whiner arguments here please.

So I am running a 5970 in my spec and cannot use fullscreen due to the large decrease in performance (pseudo fps 40-60/fullscreen fps 15-30).

I thought I would create a poll to determine what experience other sli/crossfire users are experiencing.

PLEASE LEAVE A POST STATING WHICH TYPE YOU USE, THANKS.

I have the same video card as you...and I also get decreased performance with full screen.

i get increased performance using 2 4890's with latest cat drivers, once drivers are cleanly installed i dont touch ANYTHING driver side or it f*cks it up in this game, with everything on high except trees and shadows game runs at 60fps with the very occasional slowdown with both cards showing around 35% gpu usage, if i turn shadows on, the cards go up to about 95% usage but still run at 60fps.

i dont really see a difference between pseudo and real full screen regarding performance.

but i have the impression that full screen is still not really working, at least on my rig.if i hit the escape button during a mission, most of the time it brings me to the desktop.sometimes i have to hit the escape button about 20times that i come to the menu screen.

Do you have the same decrease with vsynk OFF (both in game AND in drivers)?

It may be a case that vsynk does not work in pseudo, but works in full screen and limits your fps to 15 - 30. I had this issue till forced triple buffering ON with 3rd party software.

Thanks for the heads up Ataros, I will try this.

XFX 5970 BE 2gb, not overclocked despite the card having plently of potential as this does not seem to improve performance. No discernable difference between full-screen or psuedo (since last two patches) but I have v-sync on. X-fire display shows approx 30% on both GPUs.

After many many hours of testing i'll share my settings, which might be useful for those with similar hardware; i7 930@4ghz 6gb ram, opsys and game installed on SSD. Win 7, Catalyst 11.7.

I currently believe the best settings for me are;

Game settings; everything on full except SSAO and AA@ 2X, building detail and forest medium. Resolution set to 1776/1000@24fps (which subjectively looks great on my screen). I get no micro-stutters and really enjoy playing the game especially using some of the greatly appreciated work of campaign and mission builders. I turn off trees for on-line play and am only rarely troubled by sound bug.

I use a HD4870X2 and cannot get crossfire to activate.

only way i got crossfire to work was to uninstall the CCC and use radeon pro, make a profile for CLOD using settings i saw on here , works ok except slight graphic bugs in the prop

Using two 570's in SLI with the driver before the latest (latest driver gives me strange artifacts in several games I play) and the 2nd card is being utilised up to ~40% but absolutely no change in FPS compared to when I disable SLI.