Ryzen 9 3900x Core Voltage too high?

[mclaren85]

So after a long research, I've happily concluded to stick to AMD and built an AMD Ryzen 9 3900x system with Asus Tuf x570 plus mainboard. The performance is so good that I didn't see the need for adjusting the Ram speed to XMP (DOCP). Even my Ram speeds are 3600 compatible, I run them at 2666 mhz to not to push the system so much. So all bios settings are default.
but... the problem is when I look at the bios or via cpu-z, Vcore voltage is 1,47v. I did upgrade the bios to the latest stable version but the voltage remains the same. Also, keep in mind that cpu temps looks good, 55C under load.
Here are some photos about the core voltage, in windows the voltage is bouncing between 0,3v to 1,45v rapidly.

So What can I do guys, I'm really worried if I harm my new cpu since I've invest in a lot Can my cpu withstand that voltage? Any ideas? Thanks in advance!

 

[tabascosauz]

I know you're new to Ryzen, but I can't believe we're still having this conversation more than 1.5 years after Ryzen 3000 launch...this isn't even remotely a secret anymore.

All desktop Ryzen that is 3000 family (excluding 3000G) or later functions the same way. Very low 0.2V Vcore at "idle", up to 1.5V in single thread or lightly threaded boost, then from there gradually reducing to 1.28-1.35V at max, heaviest AVX load on all cores. This is working as intended and helps achieve the max advertised single core boost frequencies.

No, it will not grenade your chip.

I would link you a resource but I'm sure you can find something amongst the staggering arsenal of "help 1.5V idle" threads all over the internet from the past 18 months.

 

[xtreemchaos]

bro you have nothing to worry about its the nature of the beast its how thay are ment too run. i run my 3900x at stock and im very happy with it its the only cpu i dont feel the need to mess with i have my ram overclocked to 3200 none xmp.

 

[mclaren85]

bro you have nothing to worry

Should I also disable PBO?

 

[xtreemchaos]

na i wouldnt disable PBO unless it was causing a problem.

 

[mclaren85]

I've send an email to AMD technical support team. Will share the reply.

 

[Toothless]

If you did your research like you say you did, then you would know that this is normal for 3xxx and everything is fine. No need to waste AMD's time.

 

[freeagent]

If it bothers you, try a manual all core OC, you might be able to get close to your max boost clocks with pretty low voltage. But what you are seeing is normal. With mine spikes can go up to 1.525v.

 

[Deleted member 205776]

Oh hey, you remind me of me when I first got my 3900X.

Completely normal, the CPU isn't going to kill itself with voltage. Vcore drops under load, and is high on light workloads so it can sustain higher single thread boost clocks. It knows what it's doing.

Unless it's going to 1.5v while running Cinebench (which would most likely kill it), no reason to worry. Keep in mind:
high voltage + low amperage = happy healthy CPU.
high voltage + high amperage = expensive paperweight.

 

[mclaren85]

But there are some other views..

 

[xtreemchaos]

youtube isnt the end all buddy, you can allways fine something on the other side. now we can only give you our views you have to pick if you want to use them or not. goodluck.

 

[Toothless]

You, nor those wannabe tech youtubers are smarter than the engineers that made the chip. Run at stock and quit worrying about it.

Or do a custom clock with a lower voltage. Whatever makes you happy but we're just saying your chip is fine.

 

[tabascosauz]

But there are some other views..

"Full of shit" doesn't even begin to describe that first Youtuber. It doesn't take a genius to realize that the "Vcore" reading shown in BIOS literally means nothing because a stock Ryzen will never give you one single "Vcore" value to represent how it behaves.

Instead he took all the other discussion on the internet that pertains to safe all-core OC Vcore, misunderstood all of it, and for some reason thinks it applies to stock operation.

"I don't want to spread misinformation" yet here he is, spreading misinformation.

Second Youtuber just falls into the launch day "I understand nothing about Ryzen and am thus paranoid due to applying traditional know-how" camp. Which still doesn't excuse putting this kind of video out there.

And no, even if HWUB's chip died just because they increased LLC at stock (honestly wouldn't trust HWUB to OC a Ryzen CPU either), that literally doesn't mean anything because Ryzen 3000 chips die for any variety of reasons. Some just decide to depart for the silicon afterlife after never being OCed. Correlation is not causation.

 

[mclaren85]

Ok, you convince me enough already Thank all of you for your opinions and advices. now I'll wait for AMD's response. meanwhile I've switch back to default state.

 

[Deleted member 205776]

Undervolting a 3900X is sacrificing performance for no reason.

Leave the CPU to tend to itself... "Shortening life"... before that CPU even begins thinking about dying, you'll have gone through 2 new builds.

 

[Toothless]

Undervolting a 3900X is sacrificing performance for no reason.

Leave the CPU to tend to itself... "Shortening life"... before that CPU even begins thinking about dying, you'll have gone through 2 new builds.

I've seen negative offsets boost performance due to better thermals, however this is few and far between and takes way too long to dial in.

 

[Zach_01]

I'm with all people saying its normal, because it is.
Just for your piece of mind you can upload a screenshot of your system during a 100% load just for inspection from experienced users with Ryzen3000. And there are many here.

Get HWiNFO64, run sensors mode only, set window like the one below and take a screenshot during Cinebench R20 multi bench.

In order to take a look as much as possible it needs to look like this.



The run will last about ~20sec on a 3900X. You must capture it within this time. Better closer to the end but before it ends.

Showing as much sensors/readings as possible and also be visible all values from each (Current, Min, Max, Avg).
Blue arrows down left to add columns and adjust spaces with lines in first row (Sensor Current Min Max Avg)

 

[thesmokingman]

Hilarious...

 

[mclaren85]

I'm relieved and totally convinced after getting response from AMD tech support. Here what they say:

"Thank you for your email.

The CPU is programmed to use these voltages automatically. The CPU cannot and does not use voltages that are unsafe for the silicon.

because the CPU will eventually back down according to its pre-programmed model. Or if you have great cooling, that also offsets the thermal effect of voltage. In either case, you're seeing momentary blips of voltage that are offset by the hours per day your CPU is probably doing nothing at all--at a very low voltage.

Also, please to be noted that each core will work differently depends upon the workload. This processor can reach up to 1.45V to 1.5V of VCore when all the cores of the CPU runs at the max boost speeds it also depends upon the other system hardware components like MB, PUS etc. the max temperature of this CPU is 95C. However, CPU is designed to be run below the that max temperature and the max boost speed without any performance issue.

Thanks for contacting AMD."

 

[xtreemchaos]

"ask us and we tell no lies". enjoy your cpu bud it sure is a mighty chip even when it looks to be chaotic its just doing its thing. i think a lot of folks think it should behave like a intel so it can make us worry when it dont.

 

[mclaren85]

I'm with all people saying its normal, because it is.
Just for your piece of mind you can upload a screenshot of your system during a 100% load just for inspection from experienced users with Ryzen3000. And there are many here.

Get HWiNFO64, run sensors mode only, set window like the one below and take a screenshot during Cinebench R20 multi bench.

In order to take a look as much as possible it needs to look like this.

View attachment 186750

The run will last about ~20sec on a 3900X. You must capture it within this time. Better closer to the end but before it ends.

Showing as much sensors/readings as possible and also be visible all values from each (Current, Min, Max, Avg).
Blue arrows down left to add columns and adjust spaces with lines in first row (Sensor Current Min Max Avg)

Hi thank you for help! Here is my test results: (I've executed 2 seperate tests.)

 

[Zach_01]

All look nominal regarding CPU. See now the Core voltage under full stress? It’s the “CPU Core Voltage (SVI2 TFN)” the one that cores are getting.
Only 1.25V
That’s how ZEN2/3 behaves exactly.

I believe you have PBO on Auto or Disabled(?) If you enable it may run the CPU a little higher.

Also your Ram speed is low, set to 2666MHz. Is this XMP/DOCP enabled or just a simple JEDEC profile?

 

[purecain]

What a thread, I hope other people searching for this Voltage behavior with Ryzen see this thread in the future and are satisfied that their CPU isnt cooking itself.

I couldnt bring myself to look at those YouTube videos. I'd love to make a few myself and it doesnt half annoy me when I see idiots talking complete garbage with 100,000 noob followers and subs.

 

[mclaren85]

All look nominal regarding CPU. See now the Core voltage under full stress? It’s the “CPU Core Voltage (SVI2 TFN)” the one that cores are getting.
Only 1.25V
That’s how ZEN2/3 behaves exactly.

I believe you have PBO on Auto or Disabled(?) If you enable it may run the CPU a little higher.

Also your Ram speed is low, set to 2666MHz. Is this XMP/DOCP enabled or just a simple JEDEC profile?

I had disabled PBO because I was scared to harm the cpu.
Also, I haven't set the DOCP profile, even my motherboard supports up to 5100 MHZ and my Rams are up to 3600 MHZ. I just did not touch ram configuration. Just left it as it was (JEDEC), to protect the fsb or cpu etc.

 

[Cowboystrekk]

Running 3600 xmp is hardly any tougher on the system than running 2666, but performancewise you are basically nerfring your 3900X big time with that slow ram...