Vdroop

[lowjack989]

How much of a vdroop is acceptable? Whilst running prime95 on a 965BE@4.11 GHz I noticed a vdroop of 30-50mV. Is this an acceptable vdroop?

 

[henydiah]

I don't know 30-50mv good or not.
I just understand in default Idle Vcore 1.22v and sometime vdrop 1.18 and fulload vcore 1.44 and...in this we get .. 0.02of vdroop.
sorry i miss calculation . if your Vdroop untill 30-50 you must check PSU effiency because you under hi overclock

 

[lowjack989]

henydiah---my vdroop = 0.03-0.05v i.e. 30-50 mV....

The reason I ask is that the other M4A89GTD board that I have had a surge. As in, initial voltage was 1.45v it then jumped to 1.51v during prime95 small fft's. This board did completely crash...However the other M4A89GTD that I have gives me the common vdroop associated with loading on the system. So how much vdroop is acceptable before one should start to worry?

My PSU is a Kingwin LAZER 550-watt 80+ Gold cert. I don't believe that to be an issue...CPU power is regulated via VRM's right next to the socket.

 

[henydiah]

voltage was 1.45v it then jumped to 1.51v during prime95 small fft's....????

Would not, 1.51 is the peak voltage ..? and usually if the cool n Quite or C1E is still active it will happen. because it seldom willing to test stability when suddenly rose vCore from 1.45v to 1.51 v...

Vdroop while still safely restrained to 0.06v, I think yours are safe. just my assumption.

 

[jsc]

My 3 OC'd Gigabyte Core2 motherboards all have between 25 and 50 mv of vdroop.

I happen to think that .1 volt (100 mv) is a little excessive, but I have never seen anything in any technical documentation confirming that. Considering that, I believe anything between 50 and 100 mv falls into a gray area.

Personally, I wouldn't worry about 60 mv.

 

[lowjack989]

Best answer selected by lowjack989.

 

[Wisecracker]

Have you enabled LLC?

Set it at 50% and see if that smooths out your VDroop.

In some previous Asus BIOSs they had increments of 12.5% -- not sure what they are now. Moving up and down a notch from 50% (if you can) may also help smooth things out.

IIRC, there is also a slider adjustment in some versions of AMD OverDrive that might help --- called Over-Volt.

 

[lowjack989]

Yeah I thought about adjusting LLC...I am gonna do more research on load line calibration...I do not use software of any type for over-volting or OC...Thanks for your input...I am gonna start a new thread on LLC ...