cold bug search will be difficult but there will be one thing that you have to know: all steppings with an number on the 4th place have a cold bug in 99%. so like LCB9E or KAB1E and so on...

what kind of processors do you want to overclock ? The old newcastle or winchester cores or the newer san diego ? steppings like GPMW, GPAW, APMW, BPMW and FPMW are in most cases the best.

All of the cpus above arent good enough. search for another ones.

Here you can find some help: http://www.forumdeluxx.de/forum/showthread.php?t=225074 / http://www.forumdeluxx.de/forum/show...tepping+thread