I have a K6-233 o/c to 263mhz using a 75mhz FSB with 3.5 multiplier. Left voltage where it was. Currently has been running for 3 month's with no problems. I'm using a X-large heatsink and fan with case fan. Can't tell you what temp. is cause I don't know. Mobo is M5ATA by Biostar (I think, I can't remember!!!) Running Rain 1.0 and Win95verB.
Main DVD MM Rig:
CoolerMaster Storm Scout
AM3 Phenom II x4 955BE @ 3.6 ghz
Corsair H50 Watercooling kit
4.0 GB AData DDR3
GIGABYTE GA-MA770T-UD3P Mainboard
Western Digital 750GB 7200rpm w/32mb cache
Samsung 750GB 7200rpm w/32mb cache
Western Digital 1.0TB 7200rpm w/32mb cache
LG 20x DVDRW-DL "SuperDrive"
PNY GeForce 9800gt 1024mb w/Samsung 245BW 24" LCD
Corsair 620w Modular Power Supply
Logitech z-640 5.1's
Logitech Wireless Mouse
Win 7 Ultimate........