setting up crossfire

[GastricTitan]

I've just installed 2 Radeon HD 3870's, I've connected both to my PSU. PC recognizes both of them and drivers are up to date and crossfire is enabled in the control centre.

However i can't find a guide to setting up 'crossfire' anywhere. I have two 'crossfire bridge interconnect cables', one with each card, do I have to connect BOTH of them to the cards or just one, and is there a particular way they have to connect (like plus and minus)

Thanks

 

[GastricTitan]

Ok I've done all that, then fired up Crysis, but its playing HORRIBLE, 10fps tops. My 2900 XT was averaging around 25fps

 

[GastricTitan]

I was just going to add that i'm pulling approx 40-50 fps in dx9 at high settings, dx10 issue then.

 

[GastricTitan]

ok, just to quickly point out, microsoft have released a hotfix for multiple gpu cards. I've just obtained the file (quick search engine for crossfire/sli hotfix) and can say that Crysis is running beautifully in dx10, high settings, at top end of 50fps