How To Disable Overclocking

Disabling overclocking is a common way to lower system temperatures, improve stability, or return a used PC to its factory specifications. Depending on how the overclock was applied, you can disable it through Windows settings, specialized software, or the system BIOS. 1. Windows Power Settings (No BIOS Required)

MSR 0x1A2 (MSR_PLATFORM_INFO) bit 28: OC_LOCK. When set to 1, locks all overclocking-relevant MSRs (ratio, voltage, TDP, Turbo limits). After write once and system reset, bits become read-only until POR (Power-On Reset). However, a cold boot with external programmer can reset – true permanence requires OC Fuse.
Fused Capabilities: On high-end desktop (e.g., 10980XE), Intel burns OC_DISABLE_FUSE in the Non-Volatile Memory (NVM) array of the PCH. Detect via rdmsr 0x1A4. Once blown, no OS or BIOS can raise multiplier above max non-OC turbo.
Intel ME (Management Engine) Lock: Using MEInfo and AMT HECI commands, one can set OverclockingLock=Enabled in the ME NVRAM. ME reinstates this lock before every boot.

# Linux: Set OC_LOCK permanently
wrmsr -a 0x1A2 $(($(rdmsr -d 0x1A2) | (1<<28)))
# Confirm
rdmsr -a -d 0x1A2 | grep -q 268435456 && echo "OC Locked"

For Intel XTU:

Open Intel XTU.
Click Default Values (the icon that looks like a circular arrow).
Click Apply.
Go to Profiles and delete any saved overclock profiles.
Uncheck Auto-start if enabled.

System instability: Your PC freezes or crashes during gaming, rendering, or even idle.
Thermal issues: Your CPU or GPU is running dangerously hot (above 85-90°C under load).
Hardware degradation: You want to extend the lifespan of your components.
Troubleshooting: You need to rule out overclocking as the source of errors before RMA-ing a part.
Power efficiency: Stock speeds consume less energy and produce less heat.
Software compatibility: Some anti-cheat engines (like in Valorant or PUBG) flag overclocks.

If you used software to overclock your CPU while Windows was running, you should use that same software to revert the settings. How to disable overclocking - ASRock Forums how to disable overclocking

Critical warning: If both BIOS and software overclocks are active, they can conflict and cause severe instability. Always disable one method entirely before using the other. Disabling overclocking is a common way to lower

CPU Core Voltage
CPU VDDCR (for AMD)
DRAM Voltage (leave at 1.2V for DDR4/DDR5 default)

5. How to Disable RAM (XMP/DOCP/EXPO) Overclocking

RAM overclocking is often overlooked but is a major cause of instability. XMP (Intel), DOCP (AMD for DDR4), and EXPO (AMD for DDR5) are factory-approved overclocks—but they are still overclocks. MSR 0x1A2 (MSR_PLATFORM_INFO) bit 28: OC_LOCK