Question CPU voltage keeps changing on its own

May 13, 2022
Hi everyone,

Recently I've been dealing with a very weird situation: the CPU voltage randomly surges to ~1.47V in Windows10 only whenever I do a sudden intense action (quick zoom in Google map, or video editing etc.). Then the voltage stays ~1.47V no matter the frequency. I have to reset the bios to bring it back to ~1.27V (default). I also upgrade and downgrade the bios version and the problem still there.
I've done 30-min stress test using AIDA64 FPU + Furmark, it has no problem and CPU voltage doesn't surge under this kind of situation.

My PC setup is below:
  • CPU: i5-12600K (default voltage OC, single core 5.2 GHz, all cores 4.9 GHz)
  • Mobo: ASUS PRIME Z690M-PLUS D4
  • Mem: TEAMGROUP T-Create Classic DDR4 3200 MHz (1.25V OC to 3600 MHz)
  • GPU: ASUS Phoenix GeForce RTX 3050 8GB (casual OC)
  • PSU: Phanteks AMP Series 550W 80+ Gold
  • BIOS: 1402
My BIOS setup is below:
  • Ai Overclock tuner: Auto (changing to "manual" doesn't solve the issue)
  • ASUS Multicore Enhancement: Enabled - remove all limits (I've tweaked this and problem still exists)
  • SVID Behavior: Auto (I've tweaked this and problem still exists)
  • Specific Performance core: 52-51-51-51-50-49.
  • Specific Efficient core: 40-40-40-40.
  • AVX2 Ratio offset: 1.
  • CPU load line calibration: Level 4.
  • BLCK Aware adaptive voltage: enabled (changing to "disabled" doesn't solve the issue).
  • Actual VRM voltage: auto.
  • CPU graphics voltage: offset, -0.04V.
  • DRAM VDD voltage: 1.25V.
Please let me know how to solve this weird issue. Thanks!
May 13, 2022
CPU core's voltage could fluctuate depending on the core's speed.

Heat also increases and decreases accordingly.
Yes I understand, it normally fluctuates between 0.7V and 1.27V depends on the speed. But when the problem comes up, the voltage surges to 1.47V and stays, no matter the speed.