B850M Pro-A WiFi power saving

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   Meanwhile I have read this article here:
https://www.pcworld.com/article/1352253/how-to-enable-eco-mode-with-ryzen-7000.html

In short, they recommend to open the BIOS advanced mode, selecting "AMD overclocking" section and there "Boost Overdrive" or PBO option. Then you should set PBO option from "auto" to "advanced". After that you will have three settings, for PPT-Limit, for TDC Limit and for EDC Limit. The PPT is the AMD default ?�socket power;??the TDC is the ?�thermally limited VRM;??and the EDC is the ?�electronically limited VRM.??
For Ryzen 7600X, the three values to enter are: 142,000 and 110,000 and 170,000

But I do not find those settings in the AMI-BIOS of my ASRock B850M Pro-A.
After some search, in the advanced BIOS I selected "OC Tweaker" Tab and then changed Performance Preset from "auto" to "PBO, Tjmax = 75°C".

But what are the consequences from this for the system performance?
Before I changed this setting, I have rendered a 1 hour video clip by KD-enlive with about 370 fps and CPU at 78°C and it completed after 4 min 50 sec.
After having changed this setting, the same video clip rendered with about 365 fps and CPU at 75°C and it completed after 5 min 27 sec.

For me, this is acceptable. But my main goal is still, to reduce the power consumption, when the CPU is nearly idle.
In the bottom tray of my Linux, I am watching the CPU frequency and even when there is nothing to do (controlled by the taskmanager), it is between 4 GHz and 5 GHz and CPU temperature is at 40°C. 

I am using an air cooler Thermalright Assassin Spirit 120 V2 Plus, which is capable to handle up to 230 Watt at 90°C and 25°C ambient.

This is a waste of energy!

On my old Fujitsu 746 Laptop, the CPU is running at some hundred MHz and only when it is needed, it goes up to 2,8 GHz. I would like to have similar settings available in the BIOS. As I am on Linux, I cannot use the ASRock Windows-Tools.

Any ideas???

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brigitta Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 30 Jul 2025 Status: Offline Points: 345	Post Options Post Reply Quote brigitta Report Post Thanks(0) Quote Reply Topic: B850M Pro-A WiFi power saving Posted: 8 hours 15 minutes ago at 8:07pm
	Meanwhile I have read this article here: https://www.pcworld.com/article/1352253/how-to-enable-eco-mode-with-ryzen-7000.html In short, they recommend to open the BIOS advanced mode, selecting "AMD overclocking" section and there "Boost Overdrive" or PBO option. Then you should set PBO option from "auto" to "advanced". After that you will have three settings, for PPT-Limit, for TDC Limit and for EDC Limit. The PPT is the AMD default ?�socket power;??the TDC is the ?�thermally limited VRM;??and the EDC is the ?�electronically limited VRM.?? For Ryzen 7600X, the three values to enter are: 142,000 and 110,000 and 170,000 But I do not find those settings in the AMI-BIOS of my ASRock B850M Pro-A. After some search, in the advanced BIOS I selected "OC Tweaker" Tab and then changed Performance Preset from "auto" to "PBO, Tjmax = 75°C". But what are the consequences from this for the system performance? Before I changed this setting, I have rendered a 1 hour video clip by KD-enlive with about 370 fps and CPU at 78°C and it completed after 4 min 50 sec. After having changed this setting, the same video clip rendered with about 365 fps and CPU at 75°C and it completed after 5 min 27 sec. For me, this is acceptable. But my main goal is still, to reduce the power consumption, when the CPU is nearly idle. In the bottom tray of my Linux, I am watching the CPU frequency and even when there is nothing to do (controlled by the taskmanager), it is between 4 GHz and 5 GHz and CPU temperature is at 40°C. I am using an air cooler Thermalright Assassin Spirit 120 V2 Plus, which is capable to handle up to 230 Watt at 90°C and 25°C ambient. This is a waste of energy! On my old Fujitsu 746 Laptop, the CPU is running at some hundred MHz and only when it is needed, it goes up to 2,8 GHz. I would like to have similar settings available in the BIOS. As I am on Linux, I cannot use the ASRock Windows-Tools. Any ideas???

brigitta Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 30 Jul 2025 Status: Offline Points: 345	Post Options Post Reply Quote brigitta Report Post Thanks(0) Quote Reply Posted: 13 Sep 2025 at 6:08pm
	BIOS settings for reducing power consumption when CPU is near idle? I am running an ASRock B850M Pro-A WiFi with 32 GB RAM and Ryzen 5-7600X and no additional PCI cards etc. and no overclocking. My OS is a Manjaro-Linux. When CPU is idle, this system does consume about 75 Watt. When playing a video at 1080p @50 MB/s it will consume about 95 Watts. I think, that this is a very high consumption which is not necessary for doing such "low weight" jobs. Of course, when rendering videos, I will need the full power of this machine. But rendering videos will be only about 5% of my daily work. Therefor I am looking for BIOS settings, which will enable reducing power consumption dynamically, dependent from the tasks actually running. But I could not find those settings and no hint in the BIOS manual. My question: Are there those settings? And where to find?