Ran some quick benchies and any one who doesnt have these drivers I highly recommend them:
Doom 3: 1280x1024, High, 2xAA
61.77:_____71.2
68.81:_____76.0
HL2 Stress Test: 1280x960, 2xAA, 4xAnsio, everything else on high
61.77:_____125.17
66.81:_____129.84
http://downloads.guru3d.com/download.php?id=10
[edit] oh ya, vid card is at 420/1100
Doom 3: 1280x1024, High, 2xAA
61.77:_____71.2
68.81:_____76.0
HL2 Stress Test: 1280x960, 2xAA, 4xAnsio, everything else on high
61.77:_____125.17
66.81:_____129.84
http://downloads.guru3d.com/download.php?id=10
[edit] oh ya, vid card is at 420/1100