If it enters Windows XP ( far harder stress then Vista and Win7) then you have a good one... when we did the binning of +50 CPU's it took us about 4-5 minutes per CPU do determine approx speed... if it posts into windows at 55X with eg 1.55Vcore then it will run +5500 for benching... we found 3 X 56 multies : one does 5730, one 5700 and the worst one 5660....

Posting is not good enough... and make sure when you test it has EIST and co all off...