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All that thread is saying is you want to make sure you're only running one monitoring program at once, which is true for any hardware. Having multiple programs trying to access and read the sensors at the same time is going to cause inaccurate readings.Yup heard the same, Ryzen Master is the one to use. Have the same issues, even higher reported temps with my 3700x (hitting 95C in Cinebench :S)
if you have the latest bios agesa ... one change I believe they made with 3000 series ryzens is that their sub-MS ramp up from idle to full power was changed to take a few milliseconds. Once it ramps up though, sub-ms changes in frequency and voltage can occur.
monitor tools that aren't aware of this could sample the cpu when it's spiking or dipping and provide an innacurate picture of what's going on. This dovetails into temperature readings as well as frequency readings.
ryzen master (latest version) has been updated to provide averaged samples ...as well as not wake cores out of c6 sleep to get readings. So the monitoring software is not altering the behavior of the cpu as much. Unlike other monitoring software not coded to behave the same way.. Those tools may never provide accurate idle readings.
some people report performance degradation when undervolting in single thread workloads (likely due to precision boost being unable to hit frequencies the higher voltage allowed it to).
I know on my 3900x the bios screen has the cpu core voltage sitting in the 1.4 volt range like most others report it being at. Would be interesting to see how flat voltage offsets behave compared to altering p-states of only the top-end or if maybe relaxing the cpu line load allowing more voltage droop @ stock core voltages has any positive results.
I have a decent phoronix benchmark baseline to compare to. I may have to re-run it though with sensors enabled. My original baseline was before I added the k10 patch to read the cpu temps on the 3900x.
Tech Jesus did a video on voltage offset with 3900x. Granted this was prior to the latest updates.
Majority of his testing with -.05 offset showed no real performance degradation, most changes were within margin of error. He did a little bit of -.1 which seemed to show a little bit of degradation but not much, and could be board dependent. Seems like a lot more testing needs to be done though.
My board is an Asus and I know they love having a ton of voltage just to make sure every situation works, but it really feels like they put too much on the table this time.
any good guides there for under volting cpu? I can't find any on my gigabyte aorus build. Set it from normal vcore to 1.12 and 1.17 and had lower preformance on top of higher voltage when cores are up.If you're undervolting and seeing performance drop, I'm pretty sure you're doing it wrong.
https://openbenchmarking.org/result...1&obr_sor=y&obr_ab=y&obr_hgv=ryzen+3900x+uv.1
(it's a mess with the sensors data since I had all enabled for the first couple runs, then switched to just temp and freq)
summary, 0.1v negative offset. no loss of performance, in fact, in 9 of the tests it edges out wins over stock. No loss in frequency capability. No stability issues. over 10% drop in peak and average temps.
not sure what settings are exposed on your motherboard or what the equivs would be called.
Basically, you set the offset to something like negative .1 or whatever you are attempting. I wouldn't go much further than that that though as a base undervolt (I haven't played with pstate manipulation)
goto your voltage settings
Set the cpu load line to mid aggressiveness instead of auto. Do this for the vrm etc as well
Set the cpu voltage frequency to 400 or 500 instead of auto (which seems to be 300)
Optionally set the current limits higher than 100% - like 110 or 120 depending on cooling
Set your pbo and such to enabled. Reboot.
Cpu load line aggressiveness deals with voltage sag/droop under heavy loads. You need that to be more aggressive when you're undervolting.
Voltage frequency needs to be raised to deal with the lower voltage just like previous ryzen chips. It's just more important apparently on the ryzen 7nm chips when trying to undervolt.
I've only worked with offset mode for setting the core voltage, not fixed. Not sure if you had mentioned you were setting a fixed voltage, but I wouldn't go below 1.35ish volts when in bios. I'm referring to the 3900x, which when on the bios screen likes to hover stock in the mid 1.4's.