I have watched this forum for some time, and I think someone could answer my question.
I have a very strange thing happening with my motherboard or memory. First my specs: Intel Pentium Dual Core E2160 (1,8 GHZ stock) (9x multiplier) MSI P35 NEO2-FR 2 x 2GB Kingston Value ram DDR2 800 mhz CL5 MSI 8800GTS 512 Graphics A generic 450 watt PSU powering motherboard, and another 400 watt PSU modded to power the 6 pin PCIE power for my graphics card.
My problem is that when I Overclock my FSB, I have to lower the Ratio on my memory. I pushed my FSB to 320mhz (1280QDR), so it was 2,9 ghz for my CPU with a voltage of 1.375, and everything was stable with my memory at 750mhz, with stock latency and voltage. ran 7 hours stress test without any problem.
When I tried to restart the next morning it would only do 3 long beeps, all the time, which meant incompatible or wrongly installed memory. I reset CMOS, and everything was back to normal. I oc'ed again, without problems, until the next morning, the same thing happened. I can only overclock my fsb to 233, with memory multiplier 1.66, and still be able to boot the next morning. Does anyone know what could be wrong?
More aboutproblem underclocking memory
Go to manual settings (not automatic) and do the OCing in the BIOS - after OC make sure that the RAM speed does not exceed the manufacturer's specs. Start the OC by setting the RAM ratio to a lower setting.