I also wanted to add: several people here were having an issue where their CPUs were locked to a certain frequency or voltage. The reason this happens is because, when setting a manual voltage, the CPU will run at that fixed frequency. This is obviously not ideal since you want the CPU to downclock when it's idling.
Intel has had a feature where you could set a Voltage offset (v-core offset) which allows the CPU to boost itself up or down but just at a higher or lower voltage based on the amount set. Apparently, Ryzen didn't have this feature-- until recently!
My Ryzen 7 5800x was also running quite hot at stock levels, even with Kraken x63. What I changed was the AMD equivalent of the v-core offset, along with the power allowance of the chip.
Here are two videos showing how to do this.
https://www.youtube.com/watch?v=dfkrp25dpQ0
To undervolt using an offset, go into the BIOS, find "advanced CPU configuration," then "AMD overclocking." Set Precision Boost Overdrive to advanced, and turn off PBO limits. Then head into Curve Optimizer. This is the V-core offset. This number dictates by how many mV you want to undervolt or overvolt the CPU. Set it to negative (undervolt) and set the number to 30. This is the most optimistic result, but it might not be stable. Do some stress testing and see how high you can get the negative v-core offset.
The next video is about changing power limitations for the CPU.
https://youtu.be/-m3V8gcflTU?t=420
Download the Ryzen Master application. Boot it up and go to advanced mode. Go into Profile 1, and choose Precision Boost Overdrive– or manual if you know what you’re doing. There you can adjust the peak voltage (the maximum voltage the CPU is permitted to draw), and power draw.
PPT is how much total power the CPU can consume, on mine I personally set this to 120 W. I believe stock it’s set to 142 W, which exceeds the 105 W TDP of the chip, and a big reason as to why the chip runs hot for many of us!
TDC and EDC is the amperage the motherboard is allowed to feed to the CPU for short and sustained loads.
TDC is amps for burst loads. I set mine to 105 A.
EDC is for sustained loads. I set mine to 85 A.
Important note: Ryzen Master can’t override settings in your BIOS, so for Ryzen Master settings to apply, settings in the BIOS must be set to “auto.”
Following these steps, hopefully you can have a cooler and quieter system. Or, if you so wish, a more powerful and hungry one.
Finally, I just want to stress that there is absolutely nothing wrong with how the CPU is out of the box. Precision Boost Overdrive is quite aggressive with voltage and power, but it’s within the safe parameters of the chip. Ryzen CPUs throttle themselves when they reach 90 C, which is within safe operating temperatures. However, if you’re someone like me who favors a quieter less power-hungry experience, you can absolutely tweak PBO to draw less voltage and power, while still turboing up considerably.
