Performance will go up but temps will be about the same until you apply a minus boost offset to bring performance back to you current level. Then you should see a dramatic reduction in temperatures.
Undervolting won’t damage your cpu, infact with lower temps it’s effective lifespan will be extended.
If you search for PBO tuner there will be details how to reduce voltage and then set it permenantly without having to change it every time you boot up.
Other options are to reapply thermal paste or get a bigger cooler, I run a 240 aio
You can usually go down to -30 per core but decrease in 5 degree implements and stress test for stability.
-30 on my chip reduced temps by about 8 degrees c… stress test for me all core is c72c for reference.
I take it that that now means PBO undervolting the X3D is offically supported by AMD? … I wish I’d have known that before buying my 5800X (even though I am really happy with it).
From what I gather there’s at least one mobo that has a bios update (I think it was Asus and maybe a beta) supporting PBO for the 5800X3D, unfortunately I can’t quite remember where I saw it. I also read of someone swapping out the cpu and using a saved 5800X OC profile.
Undervolting won’t damage your warranty, as there’s no hardware risk. PBO is still considered “overclocking” by AMD standards, but I would be shocked if they would deny a warranty claim due to PBO or if they would even know.
Good point for ASUS , 1.20 6b or later,
Undervolting can’t damage the CPU or the cache.
The only thing that can happen when going to low is that you get calculation errors.
I run the 5800x3d with -30 PBO undervolting and the CPU is rock stable. On 100% load for >15 min. it stays under 78 dgr. and runs with a stable clock freq. of 4500 GHz.
My motherboard is a Gigabyte B550M AORUS PRO-P.
As others have said, the only sim performance consequence is that it might actually get better as your CPU will be throttled less. The main benefit of course is that your CPU will run cooler for everything.
I had recently been using PBO2 Tuner with a -15 offset as I was getting a bit of system weirdness at -30. Turns out I was getting weirdness even with it off, but disabling XMP on my RAM, that had previously worked fine for years in my 10850K system at XMP speeds, seemed to clear the weirdness.
The other day I discovered I didn’t have my nVme drive in the fastest motherboard slot, so while I was in there changing it I shuffled and reseated my RAM. With XMP back on I am now able to run PBO2 Tuner back at -30 and, for the last two days at least, it seems to be stable.
I ran my computer all day yesterday, alternating between MSFS and Half Life Alyx, and the highest CPU temp recorded was 62.4C, which IMO is pretty good for my Gigabyte AIO 240mm liquid cooler.
PBO2 Tuner is running on ASRock X570 Taichi above UEFI Version L4.65.
Currently it is version 5.00.
I expect all major brands will have been working on it so we should soon see more. I checked MSI a couple of months ago with an X3D in mind however €248 for a 5800X was just too good to ignore. PBO -30 all cores on a per core curve I’d say I struck lucky with a golden chip.
Has anyone noticed if their CPU never works at maximum frequencies? Personally I have noticed that the frequencies dancing between 2.9 and 4.4 in a very dancer way. I work on an asus rogstrix b550 bios updated 2806, xmp active, CO -30 all cores, 1440p ultra, 64gb 3600 rx6800nitro. It’s not a drama since it’s all very fluid beyond 60fps.
The question remains, why doesn’t he work at most at 4.5?
Thank you
MSFS will not drive all CPU cores to full usage, and the main thread itself will tend to be broken over two cores during the course of running (the scheduler may do this on purpose to spread load, and therefore heat, more evenly across cores). It’s pretty common to have two threads at or flapping near full speed, and the rest kinda bouncing around depending on the amount of scenery-related processing load.
The inner workings of a modern CPU is very complex and has many variables which determine how it runs at any one point in time. The behavior you described above is normal.
Modern processors fluctuate their clocks 1000 times per second depending on internal sensors, and the clock that can be obtained from the application is an average between the two.
I am also able to observe with my eyes up to 4.4 GHz. Normal.
(I made a mistake in my reply address, sorry.)
Very normal, plus the lack of PBO adds to this so it’s not getting whipped by the mobo “faster, more intense GET TO THE CHOPPA!!!”…etc. It’ll boost when it needs to but will never be there for long.
In the marker it showed that you were gpu limited before. How is this possible?
My 5800x3d under volt 0.05 @ 4450
5800X3D still going strong…
MSI has something called “Kombo Strike 1, 2 or 3” … had a msi before i bought my asus x570-plus yesterday… worked pretty well (Kombo Strike 3)… but, no one knows exactly what it does … think it’s also undervolting something …
Asus has options to do this without PBO2 Tuner since the last bios version … but, new mainboard manufactor = i have no idea how it works 