Hi, Im running 1024mb of Corsair TwinX DDR500 PC4000 on a DFI lanparty pro875 with a P4 2.4c running at 2.84. Im unsure how to get the best out if the ram I am using. My current settings are: (Bold highligts current setting) Dram Timing Selectable: Manual or by spd Cas latency time: 2, 2.5 or 3 Active to precharge delay: 8 , 7,6,5 Dram ras# to Cas# delay: 4, 3,2 Dram ras# precharge: 4, 3,2 Mem frequency for: DDR266, DDR300, DDR400,Auto Voltage is set to 2.7 Also I have a 256mb ATI9800 Pro, in the Bios should I set AGP apature size to 256 instead of 128? Any advice you can give would be appriciated Regards Mark
you may be able to get tighter timings out of the ram as it isnt quite running at ddr500, try to get the cas latency as low as possible while still keeping it stable, also a little voltage boosy MAY help but the only way to find out it to try it.
Nice setup you have there At the moment, by running the FSB at ~236FSB (12x multiplier) you are actually underclocking the ram (going at a lower speed that it's rated at). I expect that the CPU will do an FSB of 250 (12 * 250 = 3Ghz), which would make the most out of the ram. It's also possible that the RAM can be pushed beyond that towards 550DDR. You will get a lot more performance by upping the FSB rather than tweaking the timings. The timings don't really make that much of a difference these days, especially compared to FSB rises. So my suggestion is just to gradually move the FSB up really until just before the point where you begin to lose stability. If you begin to lose stability before reaching 250FSB, try increasing the core voltage slightly.
Hi Sid, Thanks for your reply. The best I can get out of her at the moment is 235FSB. Thats putting an extra 50mv through the CPU. What sort of voltages would I be safe to go up to? Ive tried 245FSB with +150mv but it wouldnt even get past the bios. Am I safe to go beyond this? Cheers
you can put a reasonable amount of voltage on the cpu, i have mine at 1.6 and have no problem with 3.2ghz (on a 2.4) so im rather surprised that yours will not go higher, i suspect that the motherboard cold be holding you back as a 2.4c should overclock like a mofo (and you know how those mofo's overclock )
You could push the core voltage up to as much as 1.85v or even 1.90v and it'd still be fine probably, might decrease the CPU life a bit though. Keep an eye on your temps while doing this though.
I can only go from +150mv to +200mv.....cant get it to work at 240fsb using +150.....not to sure about pushing it to +200 though
