[dayvan]

Hi,

Could someone know by any chance why is Everest and AMD overdrive showing me different CPU and NB voltages to the ones I've set in the BIOS?

I have an Asus Crosshair IV formula with an AMD x6 1090T.

BIOS settings:
AI overclock tuner: auto
CPU ratio: 20
Turbo core: disabled
Extreme OV = Enabled,
CPU & NB voltage mode: Manual
CPU Voltage: 1.325
NB voltage: 1.1375
These are the only voltages I've changed.

When I load windows and start everest ultimate or AMD overdrive, they show the voltages at their default values: CPU VID=1.25 and NB VID=1.125.

So first I thought that maybe it's the apps that are showing them incorrectly, so I did a stability test = failed. I upped the voltages in AMD overdrive to values that I initially set in the BIOS, stability test = Passed.

Am I forgetting something or do I have a faulty piece?

Thanks.

EDIT:
Just updated to bios ver. 1902, and still nothing...

[Super Nade]

Hello and Welcome to the forums!

I would not trust software readings. If anything, the readings on your BIOS are more accurate. Try upping the voltages in the BIOS to see if stability improves. The goal is to see if the changes you are making in the BIOS 'stick" or not.

[dayvan]

Thanks for the welcome

The thing is, that if I don't change the voltages in BIOS (leave them on default) and I up them in AMD overdrive then system is stable

Separate question: when it comes to voltage increasing, should I just watch out for the temperature? or can the CPU fry even if the temps don't go too high?

I'm afraid that I will keep upping the voltages and ppsshhh goes my CPU

Ok, I'll try some more combinations.

Thanks.

[trents]

Voltages will not and should not show the same in Windows as in bios because you're putting the CPU and its components under some stress in Windows that is not there in bios. If you watch the voltage in HWMonitor or CoreTemp while you run Prime95 you will see them change even more. It's why you house lights may dim a little when your electric furnace kicks in.

[EarthDog]

The bios, at least in intel land, actually has a load vs windows. That why usually bios temps are higher than windows idle.

Software is not.to be trusted but frankly that's all we have. See if your mobo has its own oc software and use it.

[trents]

Originally Posted by EarthDog

The bios, at least in intel land, actually has a load vs windows. That why usually bios temps are higher than windows idle.

Software is not.to be trusted but frankly that's all we have. See if your mobo has its own oc software and use it.

That's true and I stand corrected but if I understand his post correctly I think he's comparing what reads out in Windows with what it is nominally set to in bios, not what it is actually showing in bios PC Health reporting. Whether live in bios or in Windows it will be a load and cause it to be different than what the nominal amount is set to.

[EarthDog]

My windows idle 'load' is negligable compared to the bios. 1-2% with usually zero.

Vdrop on voltages is normal...as well as vdroop (a 'real' load though, not talking bios/windows 'idle'

[trents]

Originally Posted by EarthDog

My windows idle 'load' is negligable compared to the bios. 1-2% with usually zero.

Vdrop on voltages is normal...as well as vdroop (a 'real' load though, not talking bios/windows 'idle'

Yes, but where is the baseline here? Is this 1-2% being measured from a true "no load" or is it in addition to what Windows may be pulling already. And again, how accurate is it? We may be thrown back to the original issue of the accuracy of software reporting.

[EarthDog]

Its windows task manager where I get the load percent from.

Put it this way, in the bios, I sit around 32C...in windows, I sit around 29C. There has ALWAYS been a notable difference between the bios and windows. Since Realtemp/Coretemp use the same registers as the bios to get its temps, thats a pretty solid baseline to me.

I could be mistaking, but I thought it was well known that there is slightly more of a load in the bios than in windows, for whatever reason.

[dayvan]

I see there's quite a discussion going on

Thanks for all the help guys, I upped the CPU voltage to 1.37 and left NB voltage at 1.137 (in BIOS)... After one hour of Prime95 and two and a half hours of Maxwell Render, no errors.

I just hope I'm not celebrating too early

EDIT:
5 hours maxwell, max temp 51C, at 4GHz

[trents]

You are probably correct. I just never heard a discussion about that before and have never given it much thought. I have also felt that the nominal voltage settings in bios were not necessarily precise either.