Crossfire and Windows XP x64 - help

[goreblast]

Before I state the problem here is a breakdown of the system hardware.

Intel x6800
Tuniq Tower w/ Delta fan (up to 150CFM!!!!)
Asus P5W64 WS Pro
4x1GB GSkill PC8000 HZ
Sapphire X1900XT Crossfire Edition 512MB
HIS X1900XTX 512MG
Areca 1230 w/ 4xNEW 36gb Raptors
2xOLD 36gb Raptors
Soundblaster Xfi
Tagan Dual Engine 800W PSU

I have installed Windows Professional x64 Edition on a RAID 0 array. All updates, and most recent drivers for all enabled hardware.

Catalyst drivers installed are 7.2 and directX9.0c. All is fine until I enable Crossfire. At this point I should point out that the two graphics cards have run in crossfire mode without problem in Windows XP Pro before I had a motherboard change and RAID array failure.

Once Crossfire is enabled and you try running any of the Futuremark 3DMarks there is either a directX error or the system hangs with a black screen or you get a BSOD due to one of the ATI dll files. The system freezes if the Catalyst Control Centre when you try to change either 3D or video settings.

It there a problem with 64bit systems?
As stated the same system ran this fine under XP Pro.

Any help appreciated.

[screwtech02]

What ATI drivers are you using??? I had to reload the 7.2's twice before they would play nice with my crossfire setup.. You could also try the Tweeks r us drivers too.....

[fastestone]

Could be a bad install of O.S.

Any other issues?

Were you overclocked much during install, 64 bit O.S. can be picky somtimes.

[goreblast]

Using the 7.2 Cats. No other issues I can see. Gonna try a reinstall.