Hmm, well I can OC back up to 1050/1130 on stock voltages now, but my Vantage score is still at 10.2k regardless of stock or OCed clocks. I'm probably being limited by Win7. I remember there was a recent article in THG that mentioned lower 2D performance with Win7. Having previously used Win7 RC, my scores would be 12k @ stock and 13k OCed, but ever since I've installed Win7 Professional during December, my scores have been rather low.
EDIT: Btw, I've tried using 9.7,9.9,9.12, and 10.1 drivers and I'm still stuck at 10k.