We overclock the Ryzen Threadripper Pro 9975WX up to 5625 MHz in 5 minutes or less using the ASUS Pro WS WRX90E-Sage SE motherboard and custom loop 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 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 Ai Tweaker menu.

Set Ai Overclock Tuner to EXPO. That will make the memory run at our EXPO-rated frequency of DDR5-7600 and associated voltage and timings.

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:

Parameter	PBO Disabled	PBO Enabled
CPU PPT Limit	350	2000
CPU TDC Limit	175 (x2)	538 (x2)
CPU EDC Limit	235 (x2)	770 (x2)
CPU THM Limit	95	95
CPU FIT Limit	666.31 (1X)	666.31 (1X)
CPU VID Limit	1.45	1.45
CPU FMAX Limit	5450 (CCD0) 5050 (CCD1-3)	5450 (CCD0) 5050 (CCD1-3)
CPU Curve Optimizer	0	0

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 thirty-two cores of this Ryzen Threadripper Pro 9975WX are active is 1.365V, up 55 mV from the default limit of 1.31V.

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. For multi-CCD Ryzen Threadripper 9000 CPUs like the 9975WX it’s crucial to know that each CCD has its own Fmax and the override applies to both CCDs independently.

Set Max CPU Boost Clock Override(+) to 200. This increases the Fmax of the eight Zen 5 CPU cores in CCD0 from 5450 MHz to 5650 MHz and the Fmax of the remaining 24 Zen 5 CPU cores in CCDs 1, 2, and 3 from 5050 MHz to 5250 MHz.

Enter the Curve Optimizer submenu. Here’s where the real magic happens as curve optimizer allows us to finetune the V/f curve for each core in a positive or negative direction. Each step represents around 5mV. On Ryzen Threadripper 9000 processors we can set the Curve Optimizer for all cores, per CCD, or per core.

Set Curve Optimizer to Per CCD. This is the best approach for multi-CCD Ryzen Threadripper 9000 CPUs because each CCD has its own VFT curve and may have very different undervolting capabilities. We will set a negative curve optimizer for both CCDs. 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. It’s the former we need in our overclock. Note that the Curve Optimizer settings are highly CPU-specific, so you should find the best values for your CPU rather than copy mine.

• Set CCD 0 to CCD 3 Curve Optimizer Sign to Negative.
• Set CCD 0 and CCD 2 Curve Optimizer Magnitude to 30.
• Set CCD 1 and CCD 3 Curve Optimizer Magnitude to 40.

Then save and exit the BIOS.

Ryzen Threadripper Pro 9975WX 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 5625 MHz.

When running the OCCT CPU SSE Stability Test, the average CPU CCD0 effective clock is 5293 MHz and CCD1/2/3 effective clock is 5085 MHz with 1.205 volts. The average CPU temperature is 95.0 degrees Celsius. The average CPU package power is 612.7 watts.

And that’s it. Thank you for watching, the patreons and YouTube members for their support, and see you next time!