We overclock the Ryzen 7 9800X3D up to 5750 MHz in 5 minutes or less using the ASUS ROG Crosshair X870E Hero motherboard and AIO 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 outright 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 Extreme Tweaker menu.

Set Ai Overclock Tuner to EXPO I. That will make the memory run at our EXPO-rated frequency of DDR5-6400 and timings. EXPO I will load only the primary timings and have the motherboard tune the secondary timings.

Set eCLK Mode to Asynchronous mode. This enables an external clock generator to drive the CPU frequency. Ryzen 9000 has three clock generator modes: internal, external synchronous, and external asynchronous. In External Asynchronous mode, there are two external 100 MHz clock generators. One is used exclusively for the CPU core frequency, and the other for the other parts inside the CPU. Using asynchronous eCLK is the only way to increase the maximum frequency of a Ryzen 9000 processor, as the Precision Boost Overdrive Fmax Boost Override tool only enables up to 200 MHz higher frequency.

Set BCLK2 Frequency to 105.5. That will increase our Precision Boost algorithm frequencies by 5.5%. In our case, the maximum boost frequency ceiling increases from 5450 MHz to 5750 MHz.

Switch to the Advanced menu.

Enter the AMD Overclocking submenu. This will provide us with all the advanced AMD CPU overclocking tools.

Click Accept

Enter the Precision Boost Overdrive submenu. Here, we can use the AMD Precision Boost Overdrive 2 toolkit to increase the power, current, and frequency headroom of the Precision Boost 2 boost algorithm.

Set Precision Boost Overdrive to Advanced

Set PBO Limits to Motherboard. This adjusts the PBO platform parameters PPT, TDC, and EDC according to the motherboard auto-rules. On this motherboard, we find that the following values have changed:

Set Precision Boost Overdrive Scalar Ctrl to Manual. That enables us to override the warranted silicon stress level, or FIT, which is one of the Precision Boost limiters governing the maximum allowed operating voltage.

Set Precision Boost Overdrive Scalar to 10X. This increases the FIT to ten times the factory-fused value. Now, the maximum voltage when all eight cores are active is 1.370V, up 20 mV from the default limit of 1.35V.

Set CPU Boost Clock Override to Enabled (Positive). That unlocks the ability to increase the CPU’s programmed Fmax, or maximum frequency, up to 200 MHz in steps of 25 MHz.

Set Max CPU Boost Clock Override(+) to 200. This increases the Fmax of the eight Zen 5 CPU cores from 5250 MHz to 5450 MHz.

Enter the Curve Shaper submenu. Here’s where the real magic happens as Curve Shaper allows us to finetune multiple regions the V/F curve. Setting a negative offset means the CPU will use less voltage for a given frequency and boost to a higher frequency at a specific voltage. Setting a positive offset means the CPU will use more voltage for a given frequency and boost to a lower frequency at a particular voltage.

In our overclock we use a combination of negative and positive Curve Shaper values. We use positive values to improve stability at the upper end of our ECLK-adjusted V/F curve and we use negative values to aggressively undervolt at the middle and lower end of the ECLK-adjusted V/F curve.

Note that the Curve Shaper settings are highly CPU-specific, so you should find the best values for your CPU rather than copying mine. For more details on how you can find the best values, check out the longer SkatterBencher guide on this channel.

• For all, set Low, Med, and High Temperature to Enable
• For min, low, and med frequency, set Sign to Negative and Magnitude to 30
• For high and max frequency, set Sign to Positive and Magnitude to 15

Then save and exit the BIOS.

Ryzen 7 9800X3D 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.

When running the OCCT CPU SSE Stability Test, the average CPU core effective clock is 5393 MHz with 1.206 volts. The average CPU temperature is 89.2 degrees Celsius. The average CPU package power is 166.5 watts.

And that’s it. I thank you for reading and the Patreons for the support. See you next time!