How to pick a good overclocker?

thespeakerbox

Platinum Member
Nov 19, 2004
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I've been looking to buy an opty and have seen some guides on hardforum, but nothing really good.

Can someone explain the stepping and other numbers to me?

I've had recommendations from people to look at

0550 UPMW/VPMW
0608 MPMW


How do they know. Do the numbers correspond to groups of good processors (I assume). Is it just a gamble when buying one?