HD 6950 CrossfireX Issues

[1pnoe]

So I today I received another XFX HD 6950 DD from Scan.co.uk for a crossfirex config with my existing card (exact same one). My power supply is a TX750 and so provides enough power to the cards. However, after I set up the cards and installed all the necessary divers (and switched it to crossfire mode in CCC), I played some BF3 to try it out and the fps was no different, the extra card was not making any difference. I have tried both cards individually and tried 2 different crossfire bridges, but to no avail. Please help as I hope I haven't just wasted £160 on another GPU.

Regards
Ollie

 

[RussK1]

So I today I received another XFX HD 6950 DD from Scan.co.uk for a crossfirex config with my existing card (exact same one). My power supply is a TX750 and so provides enough power to the cards. However, after I set up the cards and installed all the necessary divers (and switched it to crossfire mode in CCC), I played some BF3 to try it out and the fps was no different, the extra card was not making any difference. I have tried both cards individually and tried 2 different crossfire bridges, but to no avail. Please help as I hope I haven't just wasted £160 on another GPU.

Regards
Ollie

What board do you have?

 

[1pnoe]

Asus Sabertooth 990FX.

 

[RussK1]

Both cards work fine individually... did you try single card config in both PCIe x16 slots?

Also what drivers?

Download Catalyst12.6 here if you're not already on it.

Are you positive both cards aren't working in CF? Perhaps Vsync is on?

A good program for monitoring GPU usage in-game is MsiAfterBurner. Configure it's OSD and run a game.

 

[Motopsychojdn]

What res are you running at as well?
Moto

 

[HugoStiglitz]

try running something like 3d Mark as it will give you a score not a perceived value.
try with CFX disabled and Enabled and see what happens with the score.

Pls post your system specs as other components (Mainly CPU) may be the limiting factor and not the GPU's

 

[1pnoe]

AMD Athlon II X4 635
ASUS Sabertooth 990FX
11GB 1333GHz DDR3
1x500GB HDD 1x250GB HDD 1x128GB SSD
XFX HD6950 DD CFX
Corsair TX750
Cooler Master HAF922
Windows 7 Home Premium - 64bit
Monitor(s) 32" 1080p - 20" 900p - 18" x900p
Internet 20mb/s Virgin Media XL

 

[xtreme5]

your cpu is not too good to handle those.

 

[1pnoe]

So, I guess that my CPU is bottleneckign the performance. So now that we have found the limiting factor, what AMD CPU would you guys suggest? Phenom, Bulldozer or wait for piledriver?

 

[1pnoe]

Yes it is bottlenecking but i suggest go with the bulldozer

Would you suggest the FX-8150?

 

[RussK1]

Would you suggest the FX-8150?

No... not to be too abrasive but FX sucks... what are you willing to spend?

Anything from PII 965be - 980be would suffice.

If you have the time and the $$ for a new board I'd suggest Intel... there isn't an area where Intel doesn't have AMD beat.

 

[panwala95]

maybe that particular application isnt taxing your setup enugh. use 3dmark 11 to see the results

 

[1pnoe]

Score without CF: P4311: http://3dmark.com/3dm11/3698312
Score with CF: P5958: http://3dmark.com/3dm11/3698241
So is it battlefield causing the problem?

 

[RussK1]

Score without CF: P4311: http://3dmark.com/3dm11/3698312
Score with CF: P5958: http://3dmark.com/3dm11/3698241
So is it battlefield causing the problem?

Download Furmark and run the bench. It'll show you the scaling. BF3 is optimized for cf so should'nt be the problem.

 

[1pnoe]

Furmark score with CF: http://www.ozone3d.net/benchmarks/furmark_192_score.php?id=69472
Furmark score without CF: http://www.ozone3d.net/benchmarks/furmark_192_score.php?id=69474

So CF is definitely working as it just about, but I guess it is just struggling with BF3 for some reason.

 

[1pnoe]

BUMP
Any more ideas?

 

[Kerdany]

Did you try a different game ?

 

[1pnoe]

Saints row 3, But that...that never runs well. Valve games tend to scale pretty well though.

 

[1pnoe]

Sorry, my mistake on the last post. The valve games were set to low for some reason/ So CF doesn't work in a single game. The crossfire does not affect a single game but it does affect benchmarks.

 

[deamond63]

honeslty i didnt notice any diffrance in my two cards untill i put them under considerablle load ie i play eve on line and one card will handel about 3 accounts on max graphics when i add a 4th my gpu stand alone does not like this with both i can run up to 6 max grapics and my cards could care ither way