Right now I have 2 HD3870s running crossfire on vista ultimate 64bit edition. Games work fine using crossfire in dx9, but in dx10 only 1 card gets load. I verified this using 2 instances of GPU-z as well as having the Crossfire logo on the top right of screen. I've tried both Ati drivers and DNA custom drivers (which run better ) with no luck. Any insight on the problem?
Oh and im on service pack 2 with all updates. I tried installing some game fixes that i found via google but "the update does not apply to this system" came up so i'm assuming they're already installed.
Thanks a ton for the help.
i've been reading around tomshardware for awhile finally made an account for this post.
That was after I closed out bioshock but you see one GPU as around 80% and the other nothing
I have the internal crossfire connector on my cards and catalyst AI on standard. The thing is crossfire on my computer works in directX9 but not directx10. For instance if I load crysis warhead in dx9 crossfire logo appears and GPU-Z shows both cards having load, if i load it in dx10 it doesnt appear and one of them has nothing.
@maziar: I have not tried sp1 as I installed sp2 before I got my 2nd graphics card. In some games I get rather low fps in dx10 but I haven't played that many that support it.
Curious: Are both of your 3870's same make/model? I was wondering if this or something similar was involved in this unusual problem:
1 ATI Radeon HD 3870 GPUs support PCIe 2.0. Some third party board configurations may not fully comply with complete PCIe 2.0 specification and operate at PCIe 1.1 specifications on motherboards that support PCIe 2.0 . Please consult with board manufacturer if this is an important feature for you.