overclocking question

[BigMoe]

ok i've ben overclocking for some time. i overclock run some benchs write down my scores do not tweaking and run the same tests a second time (to get an exact score) and the scorers are at times higher or lower why? if one is truely to tweak memory cpu video should scores be exact

 

[P2Mc28]

I believe the simple answer here is nothing is exact.

To find something more "exact," run the benchmark several times, then take the average.