I have been running my Epox 8K7A anywhere from a 160 to 168MHz fsb. Usually at 160MHz I have to decrease the memory timings slightly and by 166 I have to slow them down even more. This OCZ PC2400 running at 2.9v. These settings apply when I run my cpu around 1500MHz or so. I switched cpu's and and have to juice my AXIA at 2.09v to get 1503MHz stable. I chickened out and backed off to 1467MHz at 2.01v. I tried to get stable at 1.92v and 1403MHz, but my system was unstable. Well, after trying again I was able to get stability at 1403MHz and only 1.82v, my cpu hits 38c under full load, wow! The funny thing is at a 165MHz fsb dropping down to 1403MHz I am able to run my memory timings at maximum, while at a 165MHz fsb near 1500MHz the timings had to be slowed down significantly. Why is that? Shouldn't a 165MHz fsb need the same memory timings regardless of the cpu speed? I have heard a rumour that P4's running 2GHz and higher with a DDR board can cause memory issues because the DDR makes errors at extremely high frequencies. Is this what I am experiencing now? Needless to say my 3DMark 2001 has only dropped slightly at 1403MHz instead of 1500 because the memory timings are set much faster, about 5550 now and about 5625 before.
I am ready to build a 1.6a Northwood system, but maybe I will wait for a 533MHz RDRAM board and avoid DDR, at least until more info is compiled. Maybe I just have crappy DDR, and a better stick would avoid this issue entirely.
I am ready to build a 1.6a Northwood system, but maybe I will wait for a 533MHz RDRAM board and avoid DDR, at least until more info is compiled. Maybe I just have crappy DDR, and a better stick would avoid this issue entirely.
