Radeon 6870 Crossfire makes no difference - Help!

[Daniel Smith]

I recently got another 6870, I have the latest drivers installed and everything, but there is 0% difference in FPS. It makes no sense. Help!?

[Humor]

Which game? Some games are badly coded and do not utilize both GPUs.

[Daniel Smith]

I tried Skyrim, Dead Island and Serious Sam 3.

[JohnFisher89]

did you enable crossfire in CCC

[GreenDolphin]

What is the rest of your build?

[Daniel Smith]

Crossfire is enabled, still nothing.

[JohnFisher89]

vsync is off on the games too correct? and the motherboard supports atleast x16 by x4 or 8xby8x right, it isn't one of those x16 and x1 "crossfire" boards

[Humor]

What is the rest of your build? Also try downloading MSI Afterburner and run that in the background while you play the games, it will let you know the usage percent of each GPU. This will let you know if it is completely not allowing the other GPU, or if something happens like each GPU is only running at 50% with crossfire enabled. I know this happens to me with skyrim, I haven't tried those other games.

[Phrozen99]

First thing you want to do is uninstall amd drivers and the cap.

Then download driver sweeper and sweep every amd graphic driver.

Then download the 12.1 preview and the 11.12 cap:
[url]http://support.amd.com/us/kbarticles/Pages/Catalyst121Previewdriver.aspx[/url]
[url]http://sites.amd.com/us/game/downloads/Pages/crossfirex-app-profiles.aspx[/url]

That should fix some issues and increase performance, but not to what you're going to expect.

Amd dropped the ball on the crossfire drivers and I know from personal experience that Skyrim and Dead island have shitty support. Not sure about serious same, but probably.

[Speedfalcon]

have you attached a crossfire bridge?

[Big D Duchovny]

Post your full specs.

[Daniel Smith]

[QUOTE=GoDong-DK;33908770]Post your full specs.[/QUOTE]

Windows 7 64-Bit
AMD Phenom II X4 B50 Processor ~3.4GHz
4096MB RAM
2 AMD Radeon HD 6870's (Crossfire) Internal DAC 400MHz 3814MB ~DirectX 11

[JohnFisher89]

what is the motherboard model

[Daniel Smith]

[QUOTE=JohnFisher89;33909759]what is the motherboard model[/QUOTE]

Won't tell me.

[Taipan]

[QUOTE=Daniel Smith;33910917]Won't tell me.[/QUOTE]

Download speccy or open the case and look.

While its open check your psu model and wattage.

[ripple3000]

If his PSU could not handle them wouldn't it just scream.

[Jackwumbo]

[QUOTE=QuikKill;33907509]First thing you want to do is uninstall amd drivers and the cap.

Then download driver sweeper and sweep every amd graphic driver.

Then download the 12.1 preview and the 11.12 cap:
[url]http://support.amd.com/us/kbarticles/Pages/Catalyst121Previewdriver.aspx[/url]
[url]http://sites.amd.com/us/game/downloads/Pages/crossfirex-app-profiles.aspx[/url]

That should fix some issues and increase performance, but not to what you're going to expect.

Amd dropped the ball on the crossfire drivers and I know from personal experience that Skyrim and Dead island have shitty support. Not sure about serious same, but probably.[/QUOTE]

Do exactly what the smart person right here did. you can use programs such as driver sweeper though to make it easier to remove your old drivers. Worked like a charm.