Finally got my memory's problems sorted out so I pushed it to 265 MHz

. With my CPU running at 265x10 and the video card running at 500/1300 or so, I finally
broke 30,000 in 3DMark 2001

. I haven't tried anything else all the way through since the overclock though so I don't know how much 2003/2005 would benefit from it but with the card at the above speeds, I got blue and white snow artifacts on the second test of 2005

. I let the drivers automatically overclock the card after that and it ended up setting it to 490/1270. No problems so far.
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Main PC:
Asus P6T Deluxe, Intel Core i7 920 C0 @ 3.7 GHz (195x19, 1.3v core, 1.84v PLL, 1.3625v uncore) w/Thermalright Ultra 120 Extreme, 3x2 GB G Skill PC3-12800 @ 780 MHz, 7-7-7-21-1T, 1.66v; ATi Radeon HD 4870 1 GB @ 790/1000 w/Zalman VF-1000, 300 GB WD VelociRaptor, 4x500 GB WD RE2 (RAID 10), 3ware 9650SE-4LPML RAID controller, SB X-Fi Titanium, Seasonic M12D 750w, CM Stacker 810, Windows 7 Pro 64-bit, Dell 2007WFP
XBL/PSN/WoW: Thordrune