3900xt hitting 1.49 vcore in x570 aorus master with stock settings?

[jfuze]

I just set up a 3900XT with a gigabyte Aorus X570 Master and haven't touched a single setting (not even XMP on the memory) yet both HW info and CPU-Z are telling me that my CPU is averaging 1.45 vcore and hitting around 1.49 at times. Should I be concerned about this? Is there some setting I need to disable to prevent this? The vcore setting in the BIOS (running version F30) shows it's set to 1.2v but the only time I see anything below 1.4 in the aforementioned monitoring tools is when running something all core like OCCT, in which case cores bounce between 1.3-1.35v.

I guess generally I'd just like to understand my new CPU/motherboard and am wondering what's adding on the extra .2-.3 volts on top of what I see specified in the BIOS.

[Letgomyleghoe.]

This is pretty normal for ryzen cpus as they're are more sensitive to the amount amps vs volts. If I'm wrong correct me but I remember buildzoid mentioning this

[Bad5ector]

I believe that is normal when not under load. But once you load that chip with a stress test of some kind, I think the vcore will drop to around what the BIOS reads it should be. But I don't have any first hand knowledge myself. So I will be interested in what the community has to say.

[jfuze]

1 minute ago, Bad5ector said:

I believe that is normal when not under load. But once you load that chip with a stress test of some kind, I think the vcore will drop to around what the BIOS reads it should be. But I don't have any first hand knowledge myself. So I will be interested in what the community has to say.

even in that scenario with OCCT which is a 100% load using AVX2 I'm still seeing 1.3-1.35v which is significantly higher than the 1.2v specified in the bios. This is just very out of the ordinary from what I'm used to on team blue.

I'd love to know if this is normal, or potentially a bug with the F30 bios?

[Fasauceome]

Short periods at 1.49 are ok, sustained times at that voltage are worrisome.

 

Of course, stock settings can always be improved upon. Lowering the voltage in the BIOS can lead to some improved performance and/or thermals.

[jfuze]

1 minute ago, Fasauceome said:

Short periods at 1.49 are ok, sustained times at that voltage are worrisome.

 

Of course, stock settings can always be improved upon. Lowering the voltage in the BIOS can lead to some improved performance and/or thermals.

Just in case I wasn't clear originally, the BIOS is set to 1.2v and in windows the CPU is usually running at 1.43-1.45v

[Fasauceome]

18 minutes ago, jfuze said:

Just in case I wasn't clear originally, the BIOS is set to 1.2v and in windows the CPU is usually running at 1.43-1.45v

Yes, ryzen CPUs are extremely dynamic by nature to get more performance, even without XFR or PBO enabled. Lowering the voltage in the BIOS will lower the voltage during operation by about the same offset.

Edited October 21, 2020 by Fasauceome

[tarfeef101]

Yeah that's normal if you're not under a heavy multi-core load. Idle and single core goes pretty high relative to all core by default, which is fine. Don't be worried about it 

[jfuze]

1 minute ago, tarfeef101 said:

Yeah that's normal if you're not under a heavy multi-core load. Idle and single core goes pretty high relative to all core by default, which is fine. Don't be worried about it 

So you're saying it's normal for the vcore to be .1-.15 volts higher than specified in BIOS during 100% load?

[Jurrunio]

If anything, the bios showing 1.2V is the one that's odd.

[Fasauceome]

7 minutes ago, Jurrunio said:

If anything, the bios showing 1.2V is the one that's odd.

Gigabyte be like

[mrdoubtfull]

My 3800XT goes well over 1.4v as well and during Prime95 it runs at 1.325v.. Maybe the XTs get slightly higher voltage for their higher frequencies.. I wouldn't worry too much. I tested on 2 motherboard (MSI/Asrock).. 

[tarfeef101]

41 minutes ago, jfuze said:

So you're saying it's normal for the vcore to be .1-.15 volts higher than specified in BIOS during 100% load?

Well unless you're measuring that with an oscilloscope, kinda. Onboard sensors aren't famous for being the most accurate. Some chips/boards expose die sense voltage, but that has to be done and your monitoring software also must be reading that sensor and not another. 

 

Also unless you manually disabled all forms of boost on the CPU, it very well may still boost over your settings in the bios

[jfuze]

9 hours ago, tarfeef101 said:

Well unless you're measuring that with an oscilloscope, kinda. Onboard sensors aren't famous for being the most accurate. Some chips/boards expose die sense voltage, but that has to be done and your monitoring software also must be reading that sensor and not another. 

 

Also unless you manually disabled all forms of boost on the CPU, it very well may still boost over your settings in the bios

Yeah that's sort of what I'm trying to figure out here. With intel those slight deviations from BIOS were on the order of .015-.02 volts, not .25-.3