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Which program is telling the voltage truth?

Dangerous_Dave

Dangerous_Dave

Dangerous_Dave

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Joined
21 Sep 2010
Posts
455
Just lobbed a 2500k into my p8z77i deluxe motherboard, and pushed it to a stable 4.95GHz at what AI suite says is 1.3V. Only trouble is, Core Temp says it's actually 1.41V. It's peaking at around 69C on prime95 with a Corsair H50. So which thing is telling the truth here?
 
cpu-z but i would guess and say 1.41 is the right reading for stable at that speed....unless you got very lucky with the chip :)

bios wont show you the vcore under load though as it can drop (droop) or rise depending on LLC setting
 
Funnily enough I made the mistake of using the 'extreme' automatic overclock utility. Switched it off when I noticed the temps touching 90C - but it was hitting 5.3GHz stable at 1.45V!
 
I left my vcore on auto once, it was giving me 1.5v at 4.0ghz :o

I can't really push much past 4.6GHz at around 1.3v on my 2500k, on a Kuhler 620 cooler, which I don't think is an awful lot different to a H50. My temps just touch 70 there on IBT. Although usually around the 60 mark in games.

Edit: As for the original question, I always trust CPU-Z. It may be worth trying your motherboard specific software though.
 
andy_mk3 said:
I left my vcore on auto once, it was giving me 1.5v at 4.0ghz :o

I can't really push much past 4.6GHz at around 1.3v on my 2500k, on a Kuhler 620 cooler, which I don't think is an awful lot different to a H50. My temps just touch 70 there on IBT. Although usually around the 60 mark in games.

Edit: As for the original question, I always trust CPU-Z. It may be worth trying your motherboard specific software though.
Click to expand...

I done the exact same, I used Gigabytes software and seen it hit 1.5v. Instant panic moment!! :mad:
 
I had a gigabyte board that reached 1.5v when I had manually plugged in 1.35v.

Never use auto volts. Pure aids.

And no software voltage monitoring will be 100% accurate. I like CPU-Z the most but I have no reason for doing so.

If you want the best reading grab a multimeter.
 
Ok machine has gone rather screwy. It kept trying to revert to 5.3GHz at startup, so I uninstalled AI Suite and decided to use the BIOS instead. Only problem: when I uninstalled AI Suite (or about that time) the option to alter the CPU multiplier disappeared from the BIOS. So I installed AI Suite again, but now when I alter the settings on AI suite it makes no difference to the speed the CPU actually runs at. And AI Suite still thinks that the OS Default Settings for this chip should be 5.3GHz (although now it isn't actually able to make it run that).
 
Ok it was the 'turbo mode' button. Apparently you need turbo mode enabled to have any control over the multiplier. Don't really know why. Anyway, uninstalling AI Suite again - thing takes bloody ages!
 
Dangerous_Dave said:
Also it briefly sneaks up to 5.1GHz on this 'default'
Click to expand...

That is completely wrong. Uninstall any 3rd party apps that could cause it go into your BIOS. Reset it to default.

That should be it sorted. If you have done this and its still reading 5.1Ghz and crazy voltage then I don't know what could be causing it :confused:
 
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