Eric_D: Download Powerstrip and it will tell you what BIOS your card has. It also has overclocking sliders. You can also (quickly) see the BIOS during POST. I'd recommend either the 5.22 or 5.30 nVidia Reference Drivers. I think 5.22 is the official release, but you can find Beta 5.30 if you snoop around.
Okay, here's the deal with my card (this was all done in 1 hour during lunch, so it's not complete yet):
Test Bed: C533A @ 825/BX6r2/128MB Corsair CAS2 PC100 SDRAM
Drivers: 5.30 w/ Powerstrip for OC
Stock Speed: 220/366 (box says "200/333"
Benchmarks (so far):
3DMark 2000
220/366: 5200
220/400: 5600
Q3A - Normal/640/480/16 Bit Color
220/366: 97 FPS
220/400: Not Tested (yet)
Q3A - Custom/1024 x 768/32 Bit Color and Textures/All details and effects "High" or "On"
220/366: 77 FPS
220/400: Not Tested (yet)
Q3A - Custom/1024 x 768/32 Bit Color and Textures/All details/effects "High" or "On" - FSAA Enabled
220/366: 37 FPS (looks AMAZING, but is a little choppy)
220/400: Not Tested (yet)
Max Overclock
230/410 (didn't have time to benchmark at this speed)
Beyond this artifacts start to appear. I'm not really confident of this speed on a long term basis. Seems like the 220/400 is more realistic. I haven't experimented with setting the core down to 200 and upping the memory further.
Seems like I should have been able to break 100 FPS in Q3A normal, and I was expecting something like 6000 3DMarks. Any suggestions/tweaks?