5870 crossfire lag

[kg648]

Hi guys,

Just installed 2x 5870's in my machine, with crossfire enabled ( I have tried wow/blackops/crysis2 ) they all are laggy even on low settings.

If i disable crossfire everything works fine, I have tried older drivers but unsure what else to do.

I have uninstalled the old ones first and then reinstalled the new ones.

Thanks.

 

[Orcvader]

What is the rest of the system specs?

 

[kg648]

i7 920
12gb DDR3 tripple channel.
Asus p6t

Nothing seems to be bottlenecking, cpu/ram/hdd look fine.

 

[!TIMMY!]

whats ur PSU?

 

[TOL247]

its the same for me mate Black ops runs like a dog 100fps but is very jurky and its the same for crysis 2 but bioshok 2 runs great and bad company 2 runs fantastic.

 

[kg648]

Going to sound silly, but I got that annoyed with it I took the liberty of reinstalling the OS sounds extreme, but it worked!

must have fiddled with something or the drivers maybe didnt upgrade properly.

 

[gareth170]

are u running MSI Afterburner? if so u need to totally close ccc in task manageer to stop the jurky

 

[kg648]

I lie still having issues, but a lot less worse than it was.

One thing I have noticed is that the top card runs with the fan at 100% on boot and nothing shows on the display at all, I am starting to think maybe there is something wrong with the new card. if i reboot it a few times it does come back.

the performance isn't *great* there is still lag and low fps during gameplay I have tried a few more different older drivers and the caps profiles.

 

[kg648]

MSI afterburner is that an alternative to CCC? is it it just a overclocking utility?

 

[kg648]

whats ur PSU?

It's a asaka powermax 850w

 

[Orcvader]

MSI Afterburner is like CCC but much more prefered to use for fan profiles and overclocking.

Do you have vsync turned on? Sometimes that can cause issues for multi-GPU setups.