Well, I recently received my Sapphire x1950xt video card and build my new rig yesterday! I just installed the drivers that came with the video card CD. A newer version of the drivers are out, but the installation encountered an error (googled it and found other people experiencing problems installing new Catalyst drivers for the x1950xt in particular. Lack of support?) Anyway, with all stock components and without tweaking anything I just ran 3DMark06.
Results: 5799 3D Marks
SM2.0 score: 2239
HDR/SM33.0 score: 2475
CPU score: 2130
(Edit: Ran at 1280 x 1024 Resolution)
Some System Specs: CPU: Intel Core 2 Duo E6600; Mobo: Gigabyte GA-965P-DS3; RAM: Patriot (2 x 1GB) DDR2 667 (PC2 5300); OS: Microsoft Windows XP Media Center Edition 2005 w/SP2B