P5B-E won't go past 350fsb

[Freejack2]

This is my second P5B-E and it's doing the same thing. I've had this ram and processor in a 680i board and it ran 3.2ghz (400fsb) & 800mhz on the ram just fine. This board and the last don't seem to go much past 350. I've tried 375, 400, 401, 402, 410, 412 and nothing works. I've set the voltages to 2.1 for the ram and 1.45 for the cpu and fsb with no luck. I've also upgraded to a Tuniq tower and the cpu is running at 28c idle and only a few degrees higher under load so I know it's not an overheating problem for the cpu. I'd say I just got a dud board but two of them doing this? Is there some trick I'm missing?

Cliffs: Board won't go past 350 fsb and this is the second one doing the same thing.

Thanks

 

[GuitarDaddy]

Are you upping the NB volts and FSB termination volts? Disabling C1E?

I have the same mobo and have no problem going over 400. I have the NB at 1.4 and the FSB term at 1.3. Don't even bother with 350-400 it takes too much NB volts to get it stable, start at 401 with the values I mentioned and you should be fine.

 

[Freejack2]

Thanks for your input GuitarDaddy.
I'm assuming NB is the Cpu Core voltage? If not I don't see anywhere to adjust a NB voltage. I did what you said and set the FSB term to 1.3, CPU core voltage to 1.4, and turned off C1E but still no change.
I'm running the 1002 bios which as far as I know is the latest and the board is the 1.01g revision. Power supply is a Antec Truepower II 550w and memory is OCZ Gold DDR2 800.

 

[GuitarDaddy]

Ahh! revision 1.01g boards don't have NB(north bridge) voltage control and generally don't O/C quite as well as the 1.02g boards, but I think you should still be able to get past 400. The reviewer Gary Key here on Anandtech got a 1.01g board over 500FSB

I assume you DDR speed is set on the lowest setting? It should be showing DDR700 with a 350FSB. Also disable the "Spread Spectrum" and "Execute Disable Bit". You can also try uping the FSB term to 1.45v.

I would try dropping the CPU multi to 7x or 6x, and see if you can boot at 401 just to take CPU out of the picture for the moment. My E6400 will boot windows at 8x401 with 1.4 cpu vcore, but it is not stable. It takes quite a bit more voltage to get stable, like 1.4675. This board has a pretty bad vdroop, At 1.4675 set in bios I get about 1.4 under full load

 

[Freejack2]

Tried dropping the multi to 6x. Execute disable bit and spread spectrum was already disabled.
I guess I should give up, buy a P5B Deluxe and sell this board on ebay.
Thanks for your help, too bad we couldn't get it working.

 

[Robbidoo]

I just went through exactly this - and my P5B deluxe was DOA (neither of the NICs worked properly... but that's another story).

Just wondering how you got on with the OC on the deluxe? I could only get mine up to 403 with a 6300.

 

[yiranhu]

I don't know how memory multiplier works on your P5B-e. Did you check whether you have set the memory multiplier to 1:1. If you're memory multiplier is not 1:1, 350 would mean you are running your memory at something ridiculous (instead of 700 as it should be)...

 

[Robbidoo]

It's nothing obvious like that. These P5B-E 1.01's are just really hit and miss

I can get it to post but doesn't even get to the windows loading screen at 401.

 

[aclim]

yea i got the same problem with mine, I cant get above 360fsb. I got a 6300 with crucial ram. i tried a vanilla p5b and a p5b-e and i cant go above 360. I dont know what the problem is.

 

[Robbidoo]

I've given up with it. The boards just aren't that good for overclocking. Some people are doing well with them, but loads of us aren't. Might be the northbridge voltage, who knows. My advice is to sell the board if you can and go for the abit or p5b-deluxe.