If one would upgrade from c2d 3200 to a q6600 at 3200, if all else stays the same how much of an elo increase would one get on playchess or in general? Thanks...

According to Vasik, from 2 to 4 cores you get x1.5 in time efficiency.

So if you assume that x2 is +60 Elo, you should count on 60*log(1.5)/log(2) =

So if you assume that x2 is +60 Elo, you should count on 60*log(1.5)/log(2) =

**+35 Elo**
The "official" estimate for effect of doubling of cores is 50 elo, so that sounds about right.

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