vCore on M3N78 Pro

Razyre

Razyre

Razyre

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Joined
4 Jun 2012
Posts
259
Hi there.

I'm new to overclocking and I figured as I'm getting a new system next year (Intel Haswell based hopefully!) I'd like to push this one to the absolute limit and see what I can get out of it.

Before I begin, here is my system:

- AMD Phenom II X4 940 @ 3.5GHz OC (Voltage untouched by me)
- ASUS M3N78 Pro Motherboard (Honest to god a piece of ****)
- 8GB DDR2 800 RAM
- ASUS DirectCUII GTX 560Ti 1GB GDDR5 @ 1000 Core, 2300 Mem, 1.1mv
- Corsair H50 Cooler
- CM Storm Scout

So, essentially, I want to try and overclock my Phenom II X4 as far as possible. I overclocked to 3.5GHz and did a stress test and it seems to be okay so far. I did this via multipliers as opposed to FSB, via the BIOS as you do.

However at 3.6, the system conks out as soon as you start the stress test and at 3.7 I got to starting Windows before it died.

I have had this processor at 3.7GHz before using AMD Overdrive and it was stable, so I know it is possible, but ever since I switched to an Nvidia GPU, I haven't been able to use that for anything.

So I'm almost certain my problem is the voltage. So, how would I go about changing the voltage on this board?

I have found "NB Chip voltage" which ranges from 1.2 to 1.4v as the options it gives me and that's about it. The Hardware Information panel will tell me the vCore but I can't find out how to set it anywhere.

CPU-Z tells me the processor is at 1.424v at the moment and it never really goes past that point from what I can tell.

If someone could help me, I'd be so greatful.

Thanks!

- Ross
 
Eh I just read through the manual and I can't see the CPU voltage option (it should be labelled CPU VID or similar).

What you can do is use something such as crystal CPUID or K10stat to raise the voltage and multiplier of the chip. This should be easy since you've got a BE chip so no fiddling with HT reference clock.

Since you have a H50 3.7GHz should be doable with about 1.475V. Just make sure the temp doesn't go above 50 if you can help it, 55C is the stability wall and more volts won't help.
 
See I don't think you can do it via the BIOS which is retarded...

Strangely enough, I'm getting around 43 idle with the H50 right now and only about 50 load with the 500MHz OC. I find that rather strange. I think the last 200MHz may make a massive incline in temperature, but we'll see.

I'll try the software you suggested tomorrow, although if I can't get past boot with what I have at 3.7 and that is software in Windows, it's not going to work is it?
 
You should be able to bump the voltage up using those programs. Those no reason it should crash with sufficient voltage when idling

At 1.475 my C3 955 BE works okish at 4GHz, but it gets too hot for example. I run it at 3.7GHz.
 
Right, had some fun with my 940.

Come back with the fact it will just about be stable at 3.8-3.9 but I need to stress test both to see if that is true.

I can get it to 4.0GHz for a minute max before it conks out and we're talking 1.55+ to get it to even stay on for that long lol.

How far can I push the voltage on this (Not perma, I'm going to settle at around 3.7-3.8) before I'm really, really in deep ****?

Also, CPU-Z is reading higher voltages than this program says I'm inputting?
 
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