Asus P5B (vanilla) Overview

[Xvys]

I used to have a o/c wall at 350FSB with my old ram. But with my new Ballistix PC6400 ram, it does 470FSB at stock voltages, with the same settings.

So, I don't think, comrade, your Ballistix 5300 is the problem. Those are Micron D9 chips and probably the same chips that are on the expensive PC1000 modules (but perhaps binned?)

I would make sure your ram timings are at default (ram spd enabled in bios) when trying to o/c. You can tighten them later after you find your max. FSB.

At 400FSB, I think you may still be at the 2:3 ram divider, but at 401FSB and above, its 1:1, where it is much easier to o/c.

I would try 410FSB with the cpu voltage boosted to 1.45 volts, (which in reality may be only 1.38 volts, considering the vdroop of these boards.)

Then hopefully move your way up in 10FSB increments up to your max. o/c. Voltage will have to substantially increased to get above 490-500FSB. I'd watch your temps carefully for any sustained usage over 500FSB.

My system runs stably at stock voltages at 470FSB (Cpu 1.3875v in bios, which is 1.32v at the cpu), which equates to a 3.3GHz C2D. But this system was a dog with my old ram.

I reached 525FSB with the bios cpu voltage set at 1.55v, the memory voltage at 2.1v, and the FSBterm voltage at 1.45v maximum. All the other settings are on Auto. This o/c caused extremely high cpu core temps and other parts, I'm sure. But at 470FSB is cool, stock and stable.

[Shaggy]

Spread spectrum did nothing for me. Same system stability. Orthos started failing after a few hours like it normally does.

[comrad]

I used to have a o/c wall at 350FSB with my old ram. But with my new Ballistix PC6400 ram, it does 470FSB at stock voltages, with the same settings.

So, I don't think, comrade, your Ballistix 5300 is the problem. Those are Micron D9 chips and probably the same chips that are on the expensive PC1000 modules (but perhaps binned?)

I would make sure your ram timings are at default (ram spd enabled in bios) when trying to o/c. You can tighten them later after you find your max. FSB.

At 400FSB, I think you may still be at the 2:3 ram divider, but at 401FSB and above, its 1:1, where it is much easier to o/c.

I would try 410FSB with the cpu voltage boosted to 1.45 volts, (which in reality may be only 1.38 volts, considering the vdroop of these boards.)

Then hopefully move your way up in 10FSB increments up to your max. o/c. Voltage will have to substantially increased to get above 490-500FSB. I'd watch your temps carefully for any sustained usage over 500FSB.

My system runs stably at stock voltages at 470FSB (Cpu 1.3875v in bios, which is 1.32v at the cpu), which equates to a 3.3GHz C2D. But this system was a dog with my old ram.

I reached 525FSB with the bios cpu voltage set at 1.55v, the memory voltage at 2.1v, and the FSBterm voltage at 1.45v maximum. All the other settings are on Auto. This o/c caused extremely high cpu core temps and other parts, I'm sure. But at 470FSB is cool, stock and stable.

Thanks man, but I tried loosening the ram, and setting it to default, I am 100% sure it is not the ram, my ram has the D9GMH chips on it. I tried CPU voltage at 1.45V and still nothing. Anything above 400 the pc won't boot into Windows. I hate this board.

[ryandinan]

What revision P5B do you have, and what voltage are you running to your memory?
I used to have a 1.03G P5B, and I had to have max vdimm to boot into windows on my 8x400 (3.2GHz) overclock. I then ended up getting a replacement 1.04G P5B, and the system would not boot into windows unless I had my vdimm set to 1.9v. Go figure...

-Ryan

[comrad]

What revision P5B do you have, and what voltage are you running to your memory?
I used to have a 1.03G P5B, and I had to have max vdimm to boot into windows on my 8x400 (3.2GHz) overclock. I then ended up getting a replacement 1.04G P5B, and the system would not boot into windows unless I had my vdimm set to 1.9v. Go figure...

-Ryan

I have the 1.03G and I have my ram at 2.1V

[comrad]

I got over the "wall". The problem WAS the ram... I feel very stupid now But anyways, I didn't loosen the timings, I just changed them to 5-5-5-15 4-35-4-10-6-10 which are even tighter than the stock timings. So how far did this get me? I didn't try much but it easily went to 3640

[triple_A]

I got over the "wall". The problem WAS the ram... I feel very stupid now But anyways, I didn't loosen the timings, I just changed them to 5-5-5-15 4-35-4-10-6-10 which are even tighter than the stock timings. So how far did this get me? I didn't try much but it easily went to 3640

Nice!

What bios are you using?

[comrad]

Nice!

What bios are you using?

I am using the 1102 bios.
.