cancel
Showing results for 
Search instead for 
Did you mean: 

PC Processors

Duskfall
Journeyman III

Ryzen 7700X undervolting and PBO questions

Hi everyone.
I am trying to undervolt my Ryzen 7700X to decrease temperatures and power consumption. I set a value of -30 for all cores in the curve optimizer and the system is stable. Then I tried to play around a little with PBO limits and tested the Eco mode, TDP of 65W (PPT 88W, TDC 75A, EDC 150A). It runs very cool and silent but I would like to find something in between Eco mode and stock mode without sacrificing performance. I found that a PPT value of 95W would be ideal in my case but how do I determine the values for TDC and EDC in that case? Basically I am trying to find a middle way between a TDP of 65W (Eco mode) and 105W (which would be stock). Can anyone help me out?

0 Likes
4 Replies
FunkZ
Grandmaster


@Duskfall wrote:

I would like to find something in between Eco mode and stock mode without sacrificing performance.


Note that the only way to reduce power/temps without losing performance is using CO. Or get a better cooler.

Lowering PPT or TDP will result in lower peak core frequency.

Here's a video that describes the various ways to reduce temperature and/or power consumption on 7000 series processors.

https://www.youtube.com/watch?v=FaOYYHNGlLs

 

Ryzen R7 5700X | B550 Gaming X | 2x16GB G.Skill 3600 | Radeon RX 7900XT
Ryzen R7 5700G | B550 Gaming X | 2x8GB G.Skill 4000 | Radeon Vega 8 IGP
Ryzen R5 5600 | B550 Gaming Edge | 4x8GB G.Skill 3600 | Radeon RX 6800XT
johnnyenglish
Big Boss

Like FunkZ said, ECO mode will always result in lower performance that you can somehow regain to a certain extent with Curve Optimizer. However, with a 7700X it actually doesnt make much sense to enable that as it makes on a beefier CPU like the 7950X.

 

If you can keep -30 all day long and not crashing its actually really good. If you want even lower temps, maybe adding some negative offset vCore to it on BIOS.

 

The down side is, you could start crashing while the CPU is in iddle mode.

 

Good luck 

The Englishman
Duskfall
Journeyman III

@johnnyenglish @FunkZ @Thanks for the replies. So you think just using CO is enough? Lowering TDP would give me lower power consumption though, at least that's what Cinebench says. (from 142W to 90W in Eco Mode). Is the lower performance even noticeable when lowering TDP but using CO at the same time? Cause I didn't while playing games. Also isn't the guy from the video also using lower TDP and CO at the same time?

0 Likes

The video compares the results of the various methods and in certain combinations.

You'll need to decide for yourself what is "enough" or "noticeable" for your needs.

 

Ryzen R7 5700X | B550 Gaming X | 2x16GB G.Skill 3600 | Radeon RX 7900XT
Ryzen R7 5700G | B550 Gaming X | 2x8GB G.Skill 4000 | Radeon Vega 8 IGP
Ryzen R5 5600 | B550 Gaming Edge | 4x8GB G.Skill 3600 | Radeon RX 6800XT
0 Likes