Orthis Stress Test failure (Vista 64)

Not sure if this is "hardware" or "Vista" related, mods please move if you think appropriate:
I have just upgarded my kit to:

Abit ip35 Pro
Q6600
8800 gts (640)
2 g pc2 8500

More importantly (I guess) I have made the move to Vista 64, which is new ground for me, so please forgive any dumb questions I may be asking..

Anyway - built pc using my 2xraptors (64 stripe) Raid_0 - they seem to be much more noisy now, but thats a different story.

Problem I have is that I can use Vista and play games. I have a few minor issues, but mainly fine. I can run 3dmark05 and get a decent(ish) score. Can't seem to install 06, but again, another story.

But when I try to stress test - I get a lock up fairly quickly. Using Orthos - a few minutes and it goes, yet cpu temp is still no higher than 60-65. Bios doesn't shut down until 75.....

I have to button the box. I have done no overclocking at all. I was stress testing to see stability before I even thought about that.

Any ideas what could be casuing this?

Many thanks

 

Yea i am having the same problem with vista 32. Overclocked or not after max 10 mins i get BSOD. I have Core Duo E8200, 4x1GB 1066 Mhz Kingmax, 8600 Gt,