Lowering CPU Voltage and Temperature without Compromising Performance: Disabling CEP on Intel 14th Gen Non-K CPUs

Many users attempt to lower the temperature of their Intel 14th Gen CPUs by reducing the CPU voltage. However, they discover that the performance of non-K CPUs drops significantly with reduced voltage. This is due to CEP, or Current Excursion Protection. When attempting to lower the CPU voltage, CEP is triggered, causing a substantial decrease in CPU performance.

While K-series CPUs, paired with Z chipset series motherboards, have long supported disabling CEP, non-K series CPUs do not. This is why reducing the voltage on K-series CPUs doesn't affect performance, but doing so on non-K CPUs results in decreased performance. However, the latest Intel Microcode now allows non-K 14th Gen CPUs to disable CEP as well. By simply disabling CEP in the BIOS, you can lower the CPU temperature through reduced voltage without compromising CPU performance. Now, you can keep your CPU cool without compromising its performance on your Intel 14th Gen non-K CPU. Here's a comparison of the performance with CEP enabled vs. disabled:

Below are test results comparing CPU temperature and performance with CEP enabled vs. CEP disabled. By lowering the CPU AC Load Line to reduce CPU voltage, we found that with CEP enabled on Core i9-14900 and Core i7-14700, CPU performance decreased by over 40%. However, when CEP was disabled, the CPU temperature decreased by 16°C without any impact on performance. Please note that lowering CPU voltage may lead to system instability.

▲ Now, you can disable CEP on non-K 14th Gen CPUs.

The new Intel Microcode now allows 14th Gen non-K CPUs to support disabling CEP, just like K-series CPUs. However, 13th Gen and earlier non-K CPUs do not support disabling CEP. Below is the CPU and chipset support matrix.

The latest BIOS updates with the new Intel Microcode are rolling out. Update now and experience the benefits of lower CPU temperature without sacrificing performance!

MSI Z790/ B760 Motherboards:
https://www.msi.com/Landing/intel-14th-13th-gen-raptor-lake-z790-b760-best-motherboard