Very high CPU auto voltages (1.457V) for Threadripper 3960x

Discussion created by demu on Feb 7, 2020

I build by TR3960x system (ASUS ROG Strix TRX40-E Gaming, TridentX 4x16GB @ 3600cl16, Fractal Define XL R2 case with Corsair HX850 power) just before christmas.

I used originally Noctua NH-U14S TR4-SP3 cooler, but the system run very high (hitting 95C limit always when running Cinebench R20).

I noticed that my CPU voltages were 1.457V at bios, an over 1.46V idling at desktop! (CPU-Z, Ryzen Master)

When I run Cinebench R20, the voltages lowered to 1.24 -1,26V range under stress.

I had made no overclocking or voltage changes - all BIOS settings were at AUTO.

I removed and checked the cooler several timer which helped nothing.

I finally manually set CPU voltage to 1.15v, which resulted 1.096V idling at desktop.

Cinebench R20 scores lowered from 13200-13400 (CPU peaked about 4GHz)

to about 12100! (and the processor never hit 3,8GHz under stress).

I have updated the motherboard bios to lates one (0703), which helped nothing.

I Changed my cooler to Corsair H115i RGB Platinum.

Auto idle voltages lowered to 1.409V, and Cinebench R20 CTP Stress temperature lowered to 60C.




I have understood, that 3960x idle voltage should be around 1.10V and peak to 1.26V.

Some reviews (like anandtech) also show rather high idle voltages. Are these 1.40+ idle auto voltages OK?

Or is my CPU defective?