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.

 

[Sumanji]

Hey,

Have you tried any other driver versions? Try and roll back through the older sets of Catalysts.

Also, that is one LOUD computer you have there

Suman

 

[Tute]

I think it'll be the drivers. I don't think any company on the planet really put in a lot of effort where drivers for XP64 was concerned.

I expect if you do get crossfire working it'll be troublesome and perform poorly.

I'd recommend going back to XP 32-bit or going up to Vista, which will probably be less troublesome.

Oh and by the way, that chip must clock something insane with a delta on a tuniq!

 

[goreblast]

Only got the Delta - its running through a potentiometer so is around half power.