4890 Crossfire Not working..

WazMeister · 2 Apr 2010 at 15:10

HI all,

I got a PC from OC.co.uk with a 4890, it's all Cross fire compatable etc etc.

I bought another 4890 and installed it and have a clamp bridge on the cards.

I've reinstalled drivers, done drive rcleaner etc etc.

When ever I load 3d apps i.e games I get lots of screen flickers and about 5 fps perfromance. Even 3d menus strugle to load.

For now I'm disabled crossfire in Catalyst setup.

Any suggestions?

Thanks

RJC · 2 Apr 2010 at 15:15

What is the motherboard in the machine.

Shakeel · 2 Apr 2010 at 15:36

ive never xfire but only sli. this is how i did it. Intall the first card and drivers. then just put in the 2nd card but dont install anything. then in the nvidia control panel i just turned on sli.

Due you get a blue screen or crash etc?

RynceWynd · 2 Apr 2010 at 17:25

Are both 4890's running at the same clock speeds (check in catalyst control centre > ati overdrive there should be a selector for each card)

i had a similar issue where i had overclocked one card and not the other.

worth a look.

WazMeister · 3 Apr 2010 at 13:09

I made them same hz in overdrive. clock spd.

But still not fix it.

WazMeister · 3 Apr 2010 at 13:13

Mobo is

The mobo is -
Gigabyte GA-MA790x-UD3P AMD 790x PCI express ddr2

I just noticed in Overdrive for my Primary 4890 under CURRENT VALUES

GPU clock is 240mhz
For the secondry its- 500 mhz

THis right? bit of a diffrence for same card.. this value can not be changed though.

I've adjustd my primary card which is 900hz memory clock speed to 850 same as secondary.

WazMeister · 9 Apr 2010 at 07:17

Still not working properly, any suggestions?

WazMeister · 14 Apr 2010 at 06:45

Anyone? Please

twitch · 14 Apr 2010 at 07:17

Have you tried the new card on its own ?

Just to make sure the new card works OK

RJC · 14 Apr 2010 at 07:19

Have you tested the new card by it's self to ensure it's not faulty.
Running the latest drivers from ATI.