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Help!! New e8400 keeps locking up on OC

Last response: in Overclocking
February 3, 2008 5:05:22 PM

Abit IP35-Pro
Crucial Ballistix 4GB (4 x 1GB) DDR2 800 (PC2 6400)
Tuniq Tower 120
Vista 64 bit home premium

Running latest bios.

This is my 1st full-system overclock and I'm not sure what to try next. My computer keeps locking up without any indication anywhere else that something is wrong:

Running at 425x9=3825Mhz
Memory: 5-5-5-15 at 2.2v

When I run Prime95, it locks up after only a couple of minutes without any errors. The temp on the CPU is 48c.

Any ideas what to try next?

Any advice is greatly appreciated.

More about : e8400 locking

February 3, 2008 5:56:57 PM

go with more vcore voltage, its either your cpu or your memory, dont go above 1.5v in cpuz and no more than 2.1-2.2v on your memory in your bios
February 3, 2008 6:17:39 PM

Is that 1.5v in cpuz load or no load?

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February 3, 2008 8:41:00 PM

What our your CPU core temps
February 3, 2008 8:50:17 PM

Peaked at only 48c full load. Definitely shouldn't be heat.

The thing I don't get is why a lockup? No Prime95 error, high temps, etc. Could it be a Vista x64 thing?
February 3, 2008 9:22:30 PM

I say ram.

Stress test using Prime95's blend test for 8hours. If it fails, your ram is unstable.
February 3, 2008 10:02:10 PM

What settings?

Lock it in at 2.2v 5-5-5-15? It's rated 2.2v 4-4-4-12.
The timing table shows:
400MHz 4-4-4-12-24 2T 2.2v
500MHz 5-5-5-15 30 2T 2.2v
February 3, 2008 10:04:48 PM

Do 5-5-5-15 2.0V. Just because it says 2.2V, that doesn't mean you should use it at 2.2V. If it fails, reduce or increase voltages.
February 3, 2008 10:19:19 PM

I thought the theory was start high and lower if you can. Why use 2.0v instead of 2.2v?

BTW, thanks for the help :) 
February 3, 2008 10:23:49 PM

davidc said:
I thought the theory was start high and lower if you can. Why use 2.0v instead of 2.2v?

BTW, thanks for the help :) 

Sure, anytime.

RAM is picky about the voltages. Too much voltage will make the RAM unstable.
February 4, 2008 3:24:41 AM

he is totally right, my memory is rated at 2.3v but i only do 2.1v, everything is stable, if i go above that, my memory freeks out on me sometimes, and definitely unstable at times. I would do the 2.0 and even 2.1 but never go above 2.2v