Weird...

[musawi]

hey guys my friends got a problem
"i was OC'ing yetserday, and decided to try upping my volts...
i set the fsb to 243 on my cpu, with stock volts and it was all good, then i kept pushing, making sure itll post, and i got to 253, but i KNEW it would restart on me wen i prime, so i primed, and it restarted, as i thought it would do... so i went into the bios, and changed my CPU volts to 1.55
wen i did that, it wouldnt boot windows... the loading appeared, then it ddnt startup, just froze at the welcome screen, i tried 1.5750 also, but no luck...

wen i went back to 1.5250 it loaded, and again, restarted wen priming...

i thought that increasing the volts should make it more stable... anyone got any idea wats goign on?"

I think its his PSU which is a cheapo 500W psu with little amps on the 12v line.

 

[ewhenn]

hey guys my friends got a problem
"i was OC'ing yetserday, and decided to try upping my volts...
i set the fsb to 243 on my cpu, with stock volts and it was all good, then i kept pushing, making sure itll post, and i got to 253, but i KNEW it would restart on me wen i prime, so i primed, and it restarted, as i thought it would do... so i went into the bios, and changed my CPU volts to 1.55
wen i did that, it wouldnt boot windows... the loading appeared, then it ddnt startup, just froze at the welcome screen, i tried 1.5750 also, but no luck...

wen i went back to 1.5250 it loaded, and again, restarted wen priming...

i thought that increasing the volts should make it more stable... anyone got any idea wats goign on?"

I think its his PSU which is a cheapo 500W psu with little amps on the 12v line.

I think you answered your own question...

 

[jcw122]

same

 

[tamz273]

hey, thats my problem guys, but ddtn have a chance to write up about it...

so u think its the +12v line from my PSU?

thats y its messing up wen im increasing the volts?

 

[Lancelot]

Check the amount of Amps it says for +12V on the PSU sticker...

 

[tamz273]

its 18A

 

[Lancelot]

That IS your problem (and that's a 500W PSU?!) My 460W Enermax delivers 33A on the +12V rail...

 

[musawi]

I told him it was his PSU but he wouldnt listen.

Any guys thanks for making sure waht the problem was.

 

[kraven]

I told him it was his PSU but he wouldnt listen.

Any guys thanks for making sure waht the problem was.

So when looking for a PSU (I'm upgrading in the near future), not only do I want one with high wattage but one with a strong 12v rail? My 2.6g won't oc much on my intel board. Need a new one of those too...

 

[jenko]

12v rail gets cained on p4`s when overclocked and vcore upped.
I have a cheap 550w psu with a 12v 32amp rail and its 12.2v at idle and drops to 11.7v underload when im overclocked and i can hear my cpu fan changed pitch underfull load.

 

[Paxmax]

Sounds much like my own problems...

Hmm.. that "up the voltage no boot" problem sounds awfully like my own problem with an Abit IC7-Max3. In my case it is/was a defective MB.
(see this forum "Man.. I feel like a newbie" thread)

I have gone through TWO abit IC7-MAX3 boards with the same defect, when I hit 1.65 and up in bios (about 1.58V in reality) the chip refuses to boot.

I tested the whole rig in another MB and it overclocks and overvolts fine.
(Except when I do 1.75V on cpu according to MBM and hit +60C it locks up on me)

Well, it doesnt hurt to check the +12V rail either. Install Motherboard monitor and look at the +12V rail. Overvolt/clock the cpu so far that you still are able to boot into windows.
Set MBM to 1sec interval monitoring.

If the +12V rail is at 11.5V and above you shouldnt have any problem at all.
If you see any really deep dips(down to +9V or so) then the powersupply is probaly overloading.

I have run dozens of tests and benchies and Prime95 on a P4 1.8G @ 2.4G running with a +12V rail at 10.87-11.00V with NO PROBLEMS.