Another thing to keep in mind is that the FFT sizes vary depending on the version of Prime95 and the processor for each range.

[QUOTE]I don't see a problem. FFT size is related to the logarithm. If you'll notice on the table you linked...the rows are separated by a factor of about 21/4. This is delimiting the base 2 log by fourths.[/QUOTE]

How do you figure? Perhaps a lack of sleep is causing me to calculate this incorrectly...you are speaking of the exponent ranges right?

12,830,000 x 2^1/4 yields 15,257,527...which is close to the range cap 15.3M

But raising multiply this by 2^1/4 results in 18194868- and the difference continues to get better from there. However, I have a feeling that I am going about your explanation the correct way. Could you explainw what you mean by "the rows are separated by a factor of 2^1/4?" (which to me indicated multiplication).

Also, is there a reason that these particular ranges where chosen if they FFT size is a direct correlation of the logarthim anyway?

Thanks,

Kyle