5800X3D Undervolting / Negative C.O. Settings

B

Bloot

Active member
PRIVATE FIRST CLASS
Joined
Dec 14, 2019
Messages
118
==========================
EDIT

Please see Sticky in AMD Section for more info.

Alan J T


End Edit
===========================
Please add vcore negative offset setting for the 5800X3D, other boards do have it so you can undervolt it, my B550 Tomahawk on bios A90 has removed it and I can't undervolt this CPU, which is a big problem as this CPU is pretty hot at stock voltages.



Thanks!
 
Last edited by a moderator:
Alan J T

Alan J T

Demon God
Global Moderator
Joined
Sep 11, 2020
Messages
14,750
That CPU has zero OC or Undervolt settings as per AMD guidelines for it,
You will have to ask AMD to allow that as MSI will not want to be responsible for any OC setting you apply to a Locked CPU.
 
B

Bloot

Active member
PRIVATE FIRST CLASS
Joined
Dec 14, 2019
Messages
118
Alan J T said:
That CPU has zero OC or Undervolt settings as per AMD guidelines for it,
You will have to ask AMD to allow that as MSI will not want to be responsible for any OC setting you apply to a Locked CPU.
Click to expand...
Well, thanks for the response, but I've seen other board vendors who have this options, the cpu is locked at 1.35V, yes, but yet you can set a voltage in that range, set a negative offset so it stays cooler, it makes no sense hiding options that other vendors do have for this CPU, aswell as the SMT setting, it's gone in this board, it's nuts.

I mean, the CPU is locked, why hide options that work like cpu voltage negative offset? That won't damage that cpu, on the contrary, it's safer staying cooler...

I guess I'll have to switch to another mobo if MSI don't listen to reason.
 
Last edited:
plutomate

plutomate

Well-known member
MAJOR GENERAL
Joined
Jul 30, 2015
Messages
6,446
If Robert Hallock made it clear that the AMD is NOT allowing 5800X3D overclocking or core voltage adjustment, it means you're looking for the wrong guy :bonk:
 
X

Xentar712

New member
PRIVATE E-2
Joined
Aug 9, 2013
Messages
12
plutomate said:
If Robert Hallock made it clear that the AMD is NOT allowing 5800X3D overclocking or core voltage adjustment, it means you're looking for the wrong guy :bonk:
Click to expand...
Except Asus motherboard owners all have voltage control right now. And have shown 20-40c difference in CPU temps. I'd rather have the option...
 
Alan J T

Alan J T

Demon God
Global Moderator
Joined
Sep 11, 2020
Messages
14,750
Xentar712 said:
Except Asus motherboard owners all have voltage control right now. And have shown 20-40c difference in CPU temps. I'd rather have the option...
Click to expand...
Perhaps but who takes the hit to the wallet with a RMA when AMD ask what board it was on and AMD reply so AUSU are running a unauthorised modified bios so Warranty is void.
Who you going to get pissed at then,
I would say MSI will be more than happy to do it if AMD approve it but not before.
 
X

Xentar712

New member
PRIVATE E-2
Joined
Aug 9, 2013
Messages
12
Bloot said:
Well, thanks for the response, but I've seen other board vendors who have this options, the cpu is locked at 1.35V, yes, but yet you can set a voltage in that range, set a negative offset so it stays cooler, it makes no sense hiding options that other vendors do have for this CPU, aswell as the SMT setting, it's gone in this board, it's nuts.

I mean, the CPU is locked, why hide options that work like cpu voltage negative offset? That won't damage that cpu, on the contrary, it's safer staying cooler...

I guess I'll have to switch to another mobo if MSI don't listen to reason.
Click to expand...
I found an interesting software tool that takes 15C off my temps with an easy 50 mv UV. Check out my temps with some Cinebench runs
Untitled.png
. Link was here:https://www.overclock.net/threads/5800x3d-owners.1798046/post-28975484
 
B

bcbrowne57

New member
Joined
Jan 14, 2020
Messages
7
New 5800X3D user here... upgraded from 5600X on my X570 Unify board with the AGESA 1.2.0.6c BIOS. CPU cooled by an EK-240 AIO in a well-ventilated case.

Out of the box performance was excellent as expected, but I was concerned about high temps. At 1440P (3840x1600) in MS Flight Simulator flight, CPU temps were steady at 83C. Same with Cinebench 23 multi-core runs. In the BIOS, I have enabled CPPC and CPPC preferred cores, selected "low current idle" and reduced PPT from 140 to 125 watts, but there is no option to apply a negative offset to CPU voltage or (better still) to apply negative Curve Optimizer offsets.

The good news is, I found a freeware utility called "PBO2 Tuner," which allowed me to test various negative C.O. settings up to -30 per core. After stress testing I now have all cores except one at -30, with the outlier at -25. Bottom line: Performance is unaffected (actually a little bit better on Cinebench, from 14,6XX to 14,8XX) AND temperatures are better: down from 83 to 78C for the high under load. Per HWINFO 64, my VCORE under load dropped from about 1.25 to 1.17 volts. Fans turning slower, system is quieter, and I am now more confident in this chip's long-term durability. The only down-side is that the PBO2 Tuner settings are not persistent: I need to re-set the offsets with every logon.

So... if anyone from MSI ever reviews these forums, PLEASE give users the option to apply negative (ONLY negative) C.O. settings in the BIOS. This is NOT "overclocking" by any stretch of the imagination, so AMD should have no issues with it. Does anyone know whether the just-released 1.2.0.7 BETA BIOS offers any undervolting ability?
 
fatedust

fatedust

Survey Corps
FIRST LIEUTENANT
Joined
Apr 9, 2020
Messages
2,616
bcbrowne57 said:
So... if anyone from MSI ever reviews these forums, PLEASE give users the option to apply negative (ONLY negative) C.O. settings in the BIOS. This is NOT "overclocking" by any stretch of the imagination, so AMD should have no issues with it.
Click to expand...
As far as I know, AMD locks overclocking and underclocking on 5800X3D...
 
X

Xentar712

New member
PRIVATE E-2
Joined
Aug 9, 2013
Messages
12
bcbrowne57 said:
New 5800X3D user here... upgraded from 5600X on my X570 Unify board with the AGESA 1.2.0.6c BIOS. CPU cooled by an EK-240 AIO in a well-ventilated case.

Out of the box performance was excellent as expected, but I was concerned about high temps. At 1440P (3840x1600) in MS Flight Simulator flight, CPU temps were steady at 83C. Same with Cinebench 23 multi-core runs. In the BIOS, I have enabled CPPC and CPPC preferred cores, selected "low current idle" and reduced PPT from 140 to 125 watts, but there is no option to apply a negative offset to CPU voltage or (better still) to apply negative Curve Optimizer offsets.

The good news is, I found a freeware utility called "PBO2 Tuner," which allowed me to test various negative C.O. settings up to -30 per core. After stress testing I now have all cores except one at -30, with the outlier at -25. Bottom line: Performance is unaffected (actually a little bit better on Cinebench, from 14,6XX to 14,8XX) AND temperatures are better: down from 83 to 78C for the high under load. Per HWINFO 64, my VCORE under load dropped from about 1.25 to 1.17 volts. Fans turning slower, system is quieter, and I am now more confident in this chip's long-term durability. The only down-side is that the PBO2 Tuner settings are not persistent: I need to re-set the offsets with every logon.

So... if anyone from MSI ever reviews these forums, PLEASE give users the option to apply negative (ONLY negative) C.O. settings in the BIOS. This is NOT "overclocking" by any stretch of the imagination, so AMD should have no issues with it. Does anyone know whether the just-released 1.2.0.7 BETA BIOS offers any undervolting ability?
Click to expand...
Just checked. The latest bios doesn't help...
 
X

Xentar712

New member
PRIVATE E-2
Joined
Aug 9, 2013
Messages
12
Svet said:
You can try this new beta bios:

E7C35AMS.AD3

drive.google.com drive.google.com
which has additional vcore offset, PBO and curve optimizer:
View attachment 160331View attachment 160332View attachment 160333View attachment 160334View attachment 160335View attachment 160336
Note: However MSI people do not recommend to modify any settings regarding CPU overclocking!
Click to expand...
Nooo!! Literally it's the day after I switched motherboards lol. Oh well, I'm glad you were able to update it. I gave up after hearing no word for so long, otherwise I would have waited.
 
Alan J T

Alan J T

Demon God
Global Moderator
Joined
Sep 11, 2020
Messages
14,750
Xentar712 said:
Nooo!! Literally it's the day after I switched motherboards lol. Oh well, I'm glad you were able to update it. I gave up after hearing no word for so long, otherwise I would have waited.
Click to expand...
Testing takes time and we don't know how many R7 5800X3D MSI have to test with of how many Staff. Plus it not helping with Intel Dropping 4 new Chipsets this year that are still buggy.
 
D

darth_lugoj

New member
PRIVATE E-2
Joined
Jul 15, 2015
Messages
3
hello, totally agree, the negative offset is necessary and it is not dangerous, if MSI does not implement this option, they will lose a client, although I doubt they will care
 
B

Bloot

Active member
PRIVATE FIRST CLASS
Joined
Dec 14, 2019
Messages
118
plutomate said:
i believe MSI is going to release BIOS which enables offset sooner or later, MSI BIOS release schedule is not always on top of the line though, sometimes might take a while
View attachment 160646
Click to expand...
Thank you, SMT, CO, PBO and negative offset vcore, that's awesome. I was about to switch boards lol

Hope the bios is out for my B550 Tomahawk soon. Thanks again.
 
Top