How to limit ryzen 3700x to 1.32v while keeping pbo/xfr enabled.

[Radeon 9800XT]

^topic.

I need all cores to be limited to 1.32v and I want amd cool & quiet to be kept enabled too.
My motherboard is a MSI x470 Pro gaming carbon.

 

[thesmokingman]

There's no need to control voltage if you are using PBO. Why do you think you need to limit it?

 

[Radeon 9800XT]

I was doing some reading just now and it looks like I need to find the FIT voltage for my cpu. Let's say the fit voltage is 1.28v, how can I make this the limit? On my old 1700x I saw pbo/xfr voltages at 1.5v max and I don't trust those voltages (I'm aware of the micro second at a time reasoning behind it). Do I need to use offset voltage feature to get what I'm after?

 

[Deleted member 193596]

does not make even sense.
the CPU skips cycles when you are not running a fixed frequency.

but what's your point?
Low current high vcore
high current low vcore.

completely normal.
and if you do not trust a company making it's own product with a 3 year warranty.. why did you bought it in the first place?

 

[Chaba422]

ur voltage will be high only when load is very low, so theres no need to panic, its how ryzen works

 

[moproblems99]

if you do not trust a company making it's own product with a 3 year warranty.. why did you bought it in the first place?

This is what I'd like to know.

 

[thesmokingman]

I was doing some reading just now and it looks like I need to find the FIT voltage for my cpu. Let's say the fit voltage is 1.28v, how can I make this the limit? On my old 1700x I saw pbo/xfr voltages at 1.5v max and I don't trust those voltages (I'm aware of the micro second at a time reasoning behind it). Do I need to use offset voltage feature to get what I'm after?

You're misunderstanding the way voltage works under Zen 2 architecture. PBO uses auto voltage and it will never fry itself and voltage fluctuates because it's controlling voltage as quick as 1ms. Enabling a static voltage disables PBO etc etc. I recommend you leave it as is.

You need to read up a bit more on this.

Reports of Ryzen 3000 High Idle Voltage Exaggerated, a Case of the "Observer Effect" | TechPowerUp

I wrote up a bit on these chips here but its still incomplete.

How can I get the most out of my 3700x? | [H]ard|Forum

 

[mtcn77]

If you need to conserve energy, just limit EDC. However, it will keep boosting. In order to turn that off, you will need to disable core performance boost altogether.

 

[Radeon 9800XT]

Is there a way to influence pbo with voltage offset, LLC or another bios setting so that it does not go above FIT voltage for any type of usage scenario (including single core loads)?

 

[mtcn77]

It is not very practical. Just install,

ClockTuner for Ryzen Simplifies "Zen 2" Overclocking, Squeezes Out Double-digit Percent Performance

ClockTuner for Ryzen (CTR) by Yuri "1usmus" Bubliy, is an evolution of the DRAM Calculator for Ryzen utility. The utility goes beyond the functionality of the DRAM Calculator - which finds the most precise memory settings for Ryzen processors - and does your homework for Ryzen CPU overclocking...

www.techpowerup.com

Whatever the profiler picks, just select a lower EDC limit. Previous observations developed the understanding that 10% lower EDC than PPT is a good threshold to start. Say, the chip is 88w you let EDC be 80 at start. Common underclocking practices vary between 70-75A for optimal tipping point.