OK I have an Athlon 64 3000 with an MSI K8n neo4 (thats nforce 4 non-ultra). I have two 512mb sticks of corsair xms pc3200c2pt.
I recently ran nvidia's ntune program and it was able to get me a stable overclock at about a 240mhz FSB. By some chance and experimenting I have reason to believe that I can achieve 250 and beyond, with all the temps extremely low.
The problem is the computer can't run at these speeds when I set them in the BIOS -- it just hangs somewhere in POST. I've tried all sorts of settings (generally a 4x HT multiplier, 166mhz memory clock, slower timings, slightly higher voltages for chipset, memory, and cpu) but it just can't boot at the speeds that it is stable at in windows. Oh and I am sure the computer was actually running (in windows) with a FSB above 240 by looking at in in cpu-z.
So what's the deal? Does anyone know why an overclock might be stable in windows but not in POST/BIOS? I thought BIOS overclocks were supposed to be more stable?
I recently ran nvidia's ntune program and it was able to get me a stable overclock at about a 240mhz FSB. By some chance and experimenting I have reason to believe that I can achieve 250 and beyond, with all the temps extremely low.
The problem is the computer can't run at these speeds when I set them in the BIOS -- it just hangs somewhere in POST. I've tried all sorts of settings (generally a 4x HT multiplier, 166mhz memory clock, slower timings, slightly higher voltages for chipset, memory, and cpu) but it just can't boot at the speeds that it is stable at in windows. Oh and I am sure the computer was actually running (in windows) with a FSB above 240 by looking at in in cpu-z.
So what's the deal? Does anyone know why an overclock might be stable in windows but not in POST/BIOS? I thought BIOS overclocks were supposed to be more stable?
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