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Old 2010-08-02, 14:13   #10
ET_'s Avatar
Aug 2002
Team Italia

11×433 Posts

Originally Posted by Rodrigo View Post

Thank you! I increased the RAM to 500MB, and immediately the "Chance of finding a factor" estimate jumped from the original 3.22% to 5.97%.

The odd thing is, there were no changes in the way the PC was being used, other than adding the second worker. No programs that wouldn't already be running have been opened. (None that I specifically launched, at any rate.)

Anyway, as you pointed out it's not a big hit. Mostly I'm curious as to how this all works. Thanks for filling me in.

My wild, blind guess: a big exponent needs a big FFT to be tested.
A big FFT requires a big amount of memory.
While Prime95 makes use of cache memory when available, big exponents need a huge quantity of free memory, causing data exchanging from cache to RAM and vice versa.
Maybe the data transfer somewhat hit the performances of the two cores, slowing down the execution of a few percent points.


Last fiddled with by ET_ on 2010-08-02 at 14:17
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