So my GT arrived yesterday and obviously I decided to check out some performance figures for myself ... unfortunately I can't OC my PC as I used to simply because of the heat and the fact that I sold my TRUE recently and I'm running stock cooling at the moment (H20 coming soon!)
I also don't know how 3dmark scores differ between XP and Vista but this is the result I achieved in 3DMark06
CPU -- Q6600 @ 3200 (400x8)
GPU -- 8800GT @ 700/1732/1000
RAM -- Crucial Ballistix @ 800 (3-3-3-8)
O/S -- Microsoft Vista 32-bit

As you can see the SM scores are much higher than before but unfortunately my CPU score is holding me back slightly ... Oh, I couldn't run 3DMark 05 because it kept on crashing in Vista
So ja, all I can say is I'm pretty happy with the performance ... especially if you consider the fact that this card cost me a R1000 less than what I sold my GTS 640 for!!! !moon