• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

CPU voltages

C

clarkey01

Diamond Member
Hi guys

quick question

I get different readings from my Bios/CPU-Z/Core temps

If I set a voltage in the bios, can I be sure that is the correct voltage and assume CPU-z is just off its tits?

Many thanks guys

 
The voltage you set in BIOS cannot be relied upon when the CPU is under load in Windows. Vdroop means that the real voltage is going to be lower (slightly or significantly, depending on mobo/settings) under load, so you need to read the voltage when running Prime95, etc.

Generally CPU-Z is pretty accurate, but the only way to be 100% sure is to actually check the voltage with a multimeter. I've never done this; as long as the voltage seems reasonably (slightly lower than BIOS setting) then it can be trusted.

I had an experience with my AM2 setup where the voltage shown was ~.1V higher than in BIOS.... really don't know which was correct there. I suspect CPU-Z was closer to the truth though.
 
Originally posted by: Extelleron
I had an experience with my AM2 setup where the voltage shown was ~.1V higher than in BIOS.... really don't know which was correct there. I suspect CPU-Z was closer to the truth though.
Click to expand...

There will be a voltage offset between what you set the BIOS voltage to be set to by the mobo versus what the mobo hardware actually delivers to the socket. Sometimes it is high (setting 1.2V in BIOS will deliver 1.25V at the CPU...a +0.05 Voffset) and other times it will be negative.

The difficulty in knowing what your Voffset is for any given mobo is that you only see the "net net" of Voffset and Vdrop at idle. So you know what you set Vcore to in the BIOS, and you see what it is when the chip is at idle but you don't know whether you have a large or small Voffset working for or against a large or small Vdrop on the chip itself.
 
Originally posted by: clarkey01
what do you reckon I can get away with ?
Click to expand...

At 3GHz? Maybe 1.2V idle, 1.1V loaded. Possibly lower but not by much.

Originally posted by: clarkey01
Is there a list of OC's I can refer to?
Click to expand...

I'm sure there is such a list somewhere on the web but I'm not aware of any to point you towards.
 
Originally posted by: Idontcare
Originally posted by: clarkey01
what do you reckon I can get away with ?
Click to expand...

At 3GHz? Maybe 1.2V idle, 1.1V loaded. Possibly lower but not by much.

Originally posted by: clarkey01
Is there a list of OC's I can refer to?
Click to expand...

I'm sure there is such a list somewhere on the web but I'm not aware of any to point you towards.
Click to expand...

I will try tonight and post my results
 
I have the vcore in the BIOS set to 1.32V, and this is what I get under F@H load. In PC Probe, it says that I got 1.36V. So which one would be correct here? My temps are in the mid to low 50s.
 
Originally posted by: clarkey01
Originally posted by: clarkey01
Originally posted by: jaredpace
drop it a notch in your BIOS and see if Prime passes. I'll bet the temps will be <55
Click to expand...

Hmm I set it to 1.275 in the Bios and I get this at full load

CPU-z
Click to expand...

Is this normal ?
Click to expand...

Yeah


Originally posted by: geokilla
I have the vcore in the BIOS set to 1.32V, and this is what I get under F@H load. In PC Probe, it says that I got 1.36V. So which one would be correct here? My temps are in the mid to low 50s.
Click to expand...

.14 vdroop

I'd say cpuz was right @ 1.18v
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top