View Full Version : CPU core voltage fluctuation

February 4th, 2016, 11:09 AM
How much is normal at desktop idle?

February 4th, 2016, 12:17 PM
Depends on the CPU...

February 4th, 2016, 01:14 PM
i7-6700K. I'm seeing variations from 0.8 to 1.2v. Normal?

February 4th, 2016, 01:35 PM
From http://www.tomshardware.com/answers/id-2513537/cpu-vid-voltage-fluctuation-normal.html

If C-states are enabled (which is the default setting) the CPU will throttle down when idling, reducing both frequency and voltage to save power and reduce heat output. This can happen really quickly as CPU load fluctuates.

This is perfectly normal.

Modern microprocessors can change their VID and and frequency independent of one another, but the VID is usually stepped up as the CPU enters a higher power state, and stepped down as it enters a lower power state. Intel's Haswell microprocessors can actually set the VID to as low as 0 on a per core basis for ultra low power consumption.

February 4th, 2016, 01:37 PM
Cheers, so worrying for nothing again.

VID - Voltage Input Drive???

February 4th, 2016, 02:24 PM
No clue :) Google might know.

February 4th, 2016, 02:25 PM
VID is voltage ID - the default vcore voltage.