PC Processors

[kentangmatang]

Hi all,
I configured my CPU’s Precision Boost Overdrive (PBO) Curve Optimizer with the following settings:
CCD: -25
CCD1: -20

PBO Limits: Set by motherboard

Scalar: Auto
Boost Override: +200

During a Cinebench benchmark under 100% workload, the CPU voltage stabilized at 1.105V.

However, after the benchmark (when CPU load dropped to 5–15% per core), the voltage fluctuated between 1.2–1.4V.

Why does the voltage vary significantly at low workloads (near-idle conditions), even though the Curve Optimizer is configured for undervolting? And is it safe condition for long-term? Thanks

Idle condition, the voltage "active" change in range 1.2-1,4vmulticore 100% workloads, the voltage stable in 1.06v

[FunkZ]

A core hitting 5.7GHz requires more voltage than a core running 5.1GHz

Look at the RM average voltage of all cores - it's lower for a single core load than an all core load.

Not sure whether to trust HWiNFO to show per-core voltage accurately.

Other thing I would suggest is change CO from per-core to all-core and see if that makes a diff.