Question CPU voltage keeps changing on its own

May 13, 2022
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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
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10
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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.
 

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