I was playing around with my rig this morning and dropped the multiplier from 9 to 8, fsb strap from 333 to 266 and upped the fsb freq to 475. That gave me 3.8GHz DDR3-1425 (8 x 475 @ 266) vice default of 3.0GHz DDR3-1333 (9 x 333 @ 333).
Really upped my 3dmk06 score: 13,162 ***UPDATE*** Score 13,376
This is with vista business x64 and 169.04 drivers. ***I had my XFX oc to 648/1512/2050. ***UPDATE*** XFX @ 648/1620/2100
***UPDATE*** LInk: http://service.futuremark.com/compare?3dm06=3650459