Graphics BFG 9600GT OC 512MB Problem

I am experiencing the following problem with a new BFG 9600GT OC 512MB, I have used a couple of different driver versions, 171.16 (which is on installation CD) and 174.53 (in XP Pro (32 bit), but what I have found that is when I run a bench (@ stock & o'ced speeds), like Crysis or 3Dmark06, it will give a correct result (3DMark06 - 12,000, Crysis 35fps) after running it once AFTER a new driver install (having run Driver Sweeper in Safe Mode before install), but if I try to run it again on that same driver, the result drops to 33% of the previous results (3DMark06 4500, Crysis 13fps).

It is fine when just used generally....

Is this issue simply driver related, and if so what is the best way to cure the problem, ie. so that I can run benches (one after another) and get correct results without degradation...?

Thanks
________
Live Sex Webshows

 

in case you don't know, nVidia released 174.74 beta's. try those, im getting superb experiences

 

Cheers...I'll give them a go!
________
Web Shows

 

Unfortunately using the 174.74 beta drivers have not cured this issue.....

Any other suggestions welcomed....
________
VAPORIZER REVIEWS