04-13-2021 12:31 AM - last edited on 03-05-2024 07:04 PM by ROGBot
04-13-2021 01:00 AM
Zeroed85 wrote:
I'm seeing strange behavior running the 10900K in manual override mode with the XIII Hero. When I apply load to the CPU (such as Cinebench) the CPU down volts (according to HWiNFO). The voltage reading in CPU-Z is at odds with HWiNFO. When the CPU becomes idle again the voltage swings back to the manual override voltage I have set in the BIOS. I cannot figure out what is going on. :confused:
04-13-2021 01:16 AM
EncodeGR wrote:
Yes, that is the expected behaviour, it's what's called "VDroop".
The voltage drops while transitioning from "idle" to "under load". The lower your LLC (Load Line Calibration) setting is, the more VDroop you will have.
As long as you don't have any crazy drops or spikes and your CPU runs stable you don't need to worry about it. But that needs testing.
Otherwise, by increasing the LLC, you reduced those fluctuations, resulting in lower Vdroop and spikes, but your voltage will be higher overall.
Check the video below, it should answer all your questions:
https://www.youtube.com/watch?v=NMIh8dTdJwI
04-13-2021 01:35 AM
04-13-2021 01:41 AM
04-13-2021 02:07 AM
Silent Scone@ROG wrote:
The reported voltage will differ depending on the monitoring tool and whether VID is being reported or vcore. The VID is the voltage the CPU thinks it's receiving, Vcore is the real-time measurement. It's always preferable to increase Vcore rather than LLC when dialling in stability.
Cinebench is fairly current intensive hence the amount of vdroop present. Vcore monitoring on ASUS boards uses die sense which is a closer more accurate measuring point for CPU voltages under high current loads where impedances and resistance is present.