Opteron 165 0550 UPMW
2500 MHz XP-90 air, 1.30 V BIOS, 1.26 V measured (-0.05 V from default)
2670 MHz XP-90 air, 1.325 V BIOS, 1.28 V measured (-0.025 V from default)



I will update this post as I continue to find stable clocks, I'm not done yet.