We overclock the Xeon 658X 24-core processor up to 5100 MHz in 5 minutes or less using the ASUS Pro WS W890-Sage SE and water cooling.

I’ll speedrun you through the BIOS settings and provide some notes and tips along the way. Please note that this is for entertainment purposes only and not the whole picture. Please don’t copy these settings and apply them to your system. If you want to learn how to overclock this system, please check out the longer SkatterBencher guide.

All right, let’s do this.

5 Minute Speedrun

When you’ve entered the BIOS, switch to the Ai Tweaker menu.

Set Performance Preferences to ASUS Advanced OC Profile. This sets a number of BIOS options that help with overclocking, including some that override Intel’s default parameters.

Set Ai Overclock Tuner to XMP. This lets us rely on the Intel Extreme Memory Profile 3.0 technology and will make our memory run at its rated speed of DDR5-6400.

Set ASUS MultiCore Enhancement to Enabled – Remove All limits (90°C). That will unleash the Turbo Boost 2.0 power limits and let the CPU run at unlimited power indefinitely, while still maintaining a maximum temperature of 90 degrees Celsius.

Set CPU Core Ratio to By Core Usage. That allows us to configure the overclock for different scenarios ranging from 1 active core to all active cores and enables us to run the cores significantly faster when there’s more performance headroom.

Enter the By Core Usage sub-menu. That gives us access to the Turbo Boost 2.0 ratio configuration.

• Set Turbo Ratio Limit 1 to 8 to 51

Leave the By Core Usage sub-menu

Set Global Core SVID Voltage to Adaptive Mode. In Adaptive Mode, the P-cores rely on its factory-fused voltage-frequency curve to use the appropriate voltage at a given ratio. Each core has its own V/F curve. We can use the global adaptive voltage to set the maximum voltage for each core in one go. This voltage is mapped to each core’s “OC Ratio” which usually is the highest configured ratio. For this system, that’s 51X for every core, following our By Core Usage configuration.

Set Additional Turbo Mode CPU Core Voltage to 1.235. That defines the highest V/F Point for every core’s voltage-frequency curve to 51X at 1.235V which is about 150mV higher than the default maximum voltage for most P-cores.

Set Offset Mode Sign to minus.

Set Offset Voltage to 0.05. That undervolts the entire V/F curve for each P-core by 50mV, including the voltage defined for the OC Ratio. So, the highest voltage at 51X is now 1.185V instead of the previously configured 1.235V.

Then save and exit the BIOS.

Xeon 658X: Overclock Performance Improvement

We re-run some benchmarks to ensure everything works as intended and check the performance increase compared to the default settings. Higher is better, and all are higher.

The highest Core Clock reported in the operating system is 5100 MHz.

When running the OCCT CPU SSE Stability Test, the average CPU core effective clock is 4886 MHz with 1.088 volts. The average CPU temperature is 90 degrees Celsius. The average system power is 568.3 watts.

And that’s it. Thank you for reading, the Patreons and the YouTube Members for their support, and see you next time!