Hi,
I am overclocking my oldish system.
MB: Asus P5KPL-AM IN/ROEM/SI
CPU: Intel Pentium D 925
RAM: 2×2 GB A-Data 667MHztest6513316-5-5-15
PSU: Corsair 500W
Cooler: Hyper 212 Plus
So far, the system is stable at 240×15. while the memory runs at 800MHz (+0.1v, test6513316-5-5-15).
However, if I set the FSB….say to 242, the system won`t boot.
Tried increasing DRAM and MCH Voltage (not really necessary, though), but no boot again.
The board doesn`t have neither memory divider options nor CPU Overvoltage options.
I don`t think the memory causes the problem since it runs well at 844MHz with +0.1v @ 5-5-5-15.
Any help appreciated,
probfixer.
You’re running the RAM at the wrong speed. The optimal CPU:DRAM ratio for an 800MHz FSB P4 system is 3:4.
With the CPU frequency at it’s default of 200MHz, the RAM should be run at 266MHz…in other words, DDR2-533.
“The board doesn`t have neither memory divider options”
If the board supports supports AI Overclocking, do NOT use it, set it to Manual. Set the DRAM frequency to 533MHz, do NOT use ‘auto’. And as always, make sure SpeedStep & Spread Spectrum are disabled.