How to limit TDP on B650M Pro RS
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=35967
Printed Date: 27 Dec 2024 at 9:32am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: How to limit TDP on B650M Pro RS
Posted By: Sgunn
Subject: How to limit TDP on B650M Pro RS
Date Posted: 02 May 2024 at 12:10am
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Hi! Can someone give me a quick guide on how to limit the TDP on the B650M Pro Rs to 105W in the BIOS? I have a 7950x, and have read various threads for different motherboards on how to do this, but specific settings for this motherboard would be much appreciated. Also, I've read some discussions about undervolting. If that's also reasonable to do as well without impacting performance, some guidance on that as well would be appreciated. From everything I've read, limiting it to 105W dramatically lowers the amount of heat the processor puts out with pretty minor decreases in performance. Any other suggestions on BIOS settings to change from default would be welcome. Thanks, Stephen |
Replies:
Posted By: M440
Date Posted: 03 May 2024 at 5:22am
one way is to set it using the 'OC Tweaker' preset. the other way is to enter the (AFAIR) Advanced-AMD Overclocking-PBO, set PBO to advanced and there appears the field with [mW] units, so setting 105000 is 105 watt limit. Sure you should undervolt those CPUs - they run cooler and boost the clocks higher with lower power consumption. You do this by simply setting the undervolt (like -15 ) and stability testing in the OS. If you do this for all cores than you can even do this per core for ultimate chip optimization. For stability testing i recommend Aida64, because it was the fastest to give desirable results (crash if you undervolted too much!). Below is written how to set up per core undervolt. Its supraisingly quick and easy to do, because it was enough to run Aida64 for ~3 minutes to check the stability. https://ibb.co/KLVtDdd" rel="nofollow">  ------------- asrock b650m/hdv.m2, ryzen 7700x@85watt |
Sgunn wrote:Posted By: sgunnone
Date Posted: 04 May 2024 at 10:23pm
| Thank you so much! |
Posted By: M440
Date Posted: 05 May 2024 at 11:35pm
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no problem. You set the undervolt in the 'Curve Optimizer' menu in the said PBO section. ------------- asrock b650m/hdv.m2, ryzen 7700x@85watt |
Posted By: sgunnone
Date Posted: 06 May 2024 at 8:28am
| I have another question. I ran cinebench to get a baseline before I made any changes in the bios, and I noticed that the CPU was being limited to 85 degrees, even though it's a 7950x, which should limit at 95 degrees. Is this a limitation of this board? |
Posted By: sgunnone
Date Posted: 06 May 2024 at 8:40am
| Motherboard is on bios version 2.10, and temps were reported by Ryzen Master under Windows 11. |
Posted By: sgunnone
Date Posted: 07 May 2024 at 2:40am
| A redditor was able to help. It's funny, it was actually right there in front of me the whole time on the OC tweaker BIOS page. Platform thermal limit. Free form field. Descriptive text is what fooled me, since it says it's for allowing the user to lower the thermal limit. But you can put 95 in to raise the thermal limit and it accepts it and that worked. Cinebench now hovers at around 91 degrees. |