Asus P8Z68 MPro - Can't seem to adjust CPUv

[Hulk]

I can't seem to adjust the CPU voltage on my P8Z68MPRO. When I'm in the AI Tweaker screen and scroll down to CPUv there is the default value next to the box. The default value is 1.2something and in the box it says "Auto." Here's where I get confused. In the help area at the top right area of the screen when on this item is is describing CPU voltage offset. Max value you can enter is .6something. Obviously not the CPU voltage.

I notice using CPUz that my CPU idles around .928 and maxes at 1.284 under load. This is with an overclock at 4GHz.

I like how the cpu voltage goes up and down depending on load but overclocking higher than 4GHz I'm seeing voltages much higher than I like.

What am I missing here?

 

[Hulk]

In case anyone is interested I figured this out. The Asus P8Z68 motherboard does not allow direct setting of Vcore. You must do this through the offset mode. Actually it works pretty well since the automatic ramp up of Vcore as you increase the multi (and load) is a good feature but not optimized for each CPU (of course). Anyway right now I'm running 4.2GHz on my 2500k with a -0.1V offset. So at full load CPUz is showing my Vcore at 1.272V which I think is okay. Before appyling the offset it was 1.372 which I felt was too high for this particular chip.

 

[Puppies04]

The Asus P8Z68 motherboard does not allow direct setting of Vcore.

Yours might not but my asus P8Z68-v PRO does.

 

[Hulk]

Yours might not but my asus P8Z68-v PRO does.

Sorry, meant to add "mpro."

Actually I'm not missing it. I like that fact that using Voffset I can get my overclock and the Vcore comes way down when not under load.

 

[otherside]

hello guys im new here and i have the same board (p8z68-m pro), can you give me a link on how to overclock. my processor is i5-2500k. Also is it normal, when i hit the power button it seems so slow to get into the post. (approx. 1 minute or more). thanks in advance

 

[BonzaiDuck]

hello guys im new here and i have the same board (p8z68-m pro), can you give me a link on how to overclock. my processor is i5-2500k. Also is it normal, when i hit the power button it seems so slow to get into the post. (approx. 1 minute or more). thanks in advance

Here's a thread I started which contains a lot of info from others for over-clocking the "K" chips on a Z68 board (Mine's the ASUS P8Z68-V-Pro) There are also some links in there to actual test-reviews and over-clocking guides -- by themselves or within the reviews.

Even finding OC'ing guides for the "K" chips using the P67 mobo/chipset are applicable to your Z68 mobo.

As for the "delay," keep in mind I'm not familiar with the "MPro" version by ASUS, but the UEFI BIOS and other features should be similar. I'm guessing that the retail box and manual speak of "dual-intelligent processors." These boards have to "do their little thing" in the process of booting, depending on whether your just rebooting, or rebooting after changing overclock parameters. The system may "appear" to shut down, but it "magically" starts up again and continues on its merry way.

Be patient . . . .

 

[Judgement]

In case anyone is interested I figured this out. The Asus P8Z68 motherboard does not allow direct setting of Vcore. You must do this through the offset mode. Actually it works pretty well since the automatic ramp up of Vcore as you increase the multi (and load) is a good feature but not optimized for each CPU (of course). Anyway right now I'm running 4.2GHz on my 2500k with a -0.1V offset. So at full load CPUz is showing my Vcore at 1.272V which I think is okay. Before appyling the offset it was 1.372 which I felt was too high for this particular chip.

Can you elaborate a little more? I've been toying with this "offset" vcore setting and my vcore doesn't seem to be any different under load regardless of what I've done. I've set the offset from '+' to '-' and increased the value a few times...

 

[Judgement]

Ok, so I am pretty sure I have this figures out and understood it from the beginning but the value I assigned to the offset is not the actual difference I've been seeing in vcore. I had to bump it -0.1V to see a difference of. 065V

Edit:
Or the offset scales with clock speed and I have just need out of the hardware loop too long and wasn't thinking clearly

 

[Wuzup101]

Ok, so I am pretty sure I have this figures out and understood it from the beginning but the value I assigned to the offset is not the actual difference I've been seeing in vcore. I had to bump it -0.1V to see a difference of. 065V

Edit:
Or the offset scales with clock speed and I have just need out of the hardware loop too long and wasn't thinking clearly

The offset scales with clock speed. I'm not sure what the formula is to determine it, but your observed / actual voltage will increase even if you keep the "offset" value constant in your BIOS as you increase clock speed. Actually, the feature works pretty damn well in my experience (I'm using it with the board in my sig and I also have a P8Z68-M Pro like you). The Sabertooth does, of course, also have the option to use a fixed voltage. That being said, I wanted to keep all the power saving / heat reduction features active, so I went down the offset path.

I would suspect that the "auto" function for voltage determination uses the same formula to set voltage vs clock speed. The offset just allows you to customize that to your processor (IE: raise/lower as needed). The guys from Asus did post a nice P67 overclocking guide at the [H] a while ago. I'm sure a google search would turn it up!

 

[kbp]

this will get you going

http://www.clunk.org.uk/forums/overclocking/39184-p67-sandy-bridge-overclocking-guide-beginners.html