Can't fine tune vcore

[Moondrinker]

Hi lads, sorry to bother you with this question (as it might be a bit obvious) but i can't seem to adjust my vcore with small margins in the BIOS.

- For example:
If i want to adjust my vcore from 1.125 i can only adjust it to 1.250 and the next would be 1.375 and then 1.500 and so on.

How come i can't fine tune it? (example: 1.125 -> 1.126)


I use the + and - and/or pageup and pagedown.

My motherboard is the following: MSI p35 Neo2-fr.
My CPU is a E8400.

Do i need to unlock some overclocking settings on my motherboard? i have tried nearly everything ( i wonder if there's some key combination that i have to press in order to fine tune my Vcore).
Or do i simply need to update my BIOS? (i use E8400 and could use it out of the box, never flashed bios).

No help in the manual either.

Cheers!

 

[Evilonigiri]

If your motherboard doesn't support the smaller increments, sadly I believe there is no way to fix this. For example, the Gigabyte board has ram voltage increments of +.1V while ASUS's P5k-e has much smaller increments, thus making it a better board to tweak with.

 

[houstonserenity]

Just for asking how much of a OC did you want to go. on my 8400 did not have to adjust voltage till 3.7 or higher

 

[Moondrinker]

Just for asking how much of a OC did you want to go. on my 8400 did not have to adjust voltage till 3.7 or higher

4.0ghz so that's quite a pickle. . . .

EDIT:

I tried going to 3.3 actually, just adjusting the CPU voltage and then i tried running CPU-Z but it wouldn't run! Saying that it will start but it wont display any information, so i thought it was unstable and changed it back to 3.0.
I didn't run Prime95 or Orthos to check for stability but the fact that i couldn't run CPU-Z made me worry.

 

[Moondrinker]

If your motherboard doesn't support the smaller increments, sadly I believe there is no way to fix this. For example, the Gigabyte board has ram voltage increments of +.1V while ASUS's P5k-e has much smaller increments, thus making it a better board to tweak with.

It just seems unrealistic that this board, which MSI brag about is such a good and stable overclocker, can't overclock at all! Seems odd.

In the manual it even says "build for overclocking" when you read the intro.

ah heck

 

[Moondrinker]

Aha!
It says here:
Vcore: 0.0125V increments

Is this substantial enough to get a stable overclock at 4ghz? It dosn't seem like a lot actually
I figur that i have to hit about 1.450 in vcore and around 1.50 on NB.

 

[bildo123]

4.0ghz so that's quite a pickle. . . .

EDIT:

I tried going to 3.3 actually, just adjusting the CPU voltage and then i tried running CPU-Z but it wouldn't run! Saying that it will start but it wont display any information, so i thought it was unstable and changed it back to 3.0.
I didn't run Prime95 or Orthos to check for stability but the fact that i couldn't run CPU-Z made me worry.

FYI sometimes CPU-Z does that to me as well, just go to Task Manager and end process and re-run again.

 

[Evilonigiri]

Aha!
It says here:
Vcore: 0.0125V increments

Is this substantial enough to get a stable overclock at 4ghz? It dosn't seem like a lot actually
I figur that i have to hit about 1.450 in vcore and around 1.50 on NB.

You sure that's not .125v instead of .0125v? Cause if it is, it would fit your situation. Update your bios, even if it doesn't solve the issue, you could see some performance gains.

For the 65nm C2D, the upper limit of the VID is 1.5v
http://processorfinder.intel.com/details.aspx?sSpec=SLA9U

For the 45nm C2D, the upper limit of the VID is 1.3625v
http://processorfinder.intel.com/details.aspx?sSpec=SLAPL

What may have been safe on the 65nm is not safe on the 45nm anymore.