On Saturday 09 December 2006 13:27, david eddy wrote: > > Normally the B2 bound will be 20 times the B1 bound. However it also > > depends on how much RAM memory ia available to prime95, which wildly > > varies, hence the chaos in the P-1 file. > > > > Henk Stokhorst. > > How much RAM is optimal?
Infinite. Or at least the size of the user address space in whichever OS you're using.... probably between 1 and 3 GB unless you have converted to 64 bits, in which case the usable address space runs well into terabytes. In practise, for the sort of exponents we're running, 768 MB is "just about enough", however efficiency improvements occur with more memory - exponents around 1.3 million can happily use 512 MB. When setting the memory for Prime95, BE CAREFUL NOT TO INDUCE SWAPPING OR EXCESSIVE PAGING. Even a low level of swap/page file I/O will wipe out any efficiency improvements which might be achieved by allocating more memory. Regards Brian Beesley _______________________________________________ Prime mailing list [email protected] http://hogranch.com/mailman/listinfo/prime
