On Friday 26 December 2003 01:36, Jeroen wrote: > Currently I'm doing 0.078 sec/iteration with my P4-2400 (800FSB) > I have one single 512 MB PC3200 DDR memory module in my system. > How much speed increase will I see if I install another memory module so > that my memory runs in dual channel? I've looked on the benchmark pages on > mersenne.org but all I could find was just P4-2400, no single or dual > channel.
If you plan to install dual channel memory please check that the modules are _identical_ in timings as well as in size & speed. Otherwise your system will either not give best performance or may be unstable. I have no experience with dual channel PC3200 DDR but my P4-2666 system running dual channel PC2100 DDR is significantly quicker than my P4-2533 system running 1066 MHz RDRAM. On the basis that 1066 MHz RDRAM is noticeably quicker than 400 MHz single channel DDR (PC3200) I'd expect that going dual channel would give a very significant improvement in speed _for mprime/prime95_ probably around 25%. Whether this would reflect in "standard benchmarks" using graphics, games etc. is a mystery to me. mprime/prime95 hit the memory bus _very_ hard & anything you can do to ramp up the CPU/memory bandwidth is definitely not going to hurt! Regards Brian Beesley _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
