Weird CPU behaviour

[bmcvl]

Hey,

 

I have a ryzen 3600 (undervolted to 1.25v @ 4.025 Ghz ) for about a year now. Those settings were well stable with stress when I first set up. Never had an issue (and I always keep an eye on my task manager) until now that I caught the second time (in a week or so) doing this where Core#0 just "dies" randomly, where the usage (of that core) is between 0 and 3% from there until I restart it.

 

I don't have a clue if this is a visual bug, some bug on windows, a driver, a CPU clock problem, or even an Application causing it, and I can't find anything online about this weird behaviour.

 

I don't notice apps crashing nor much of a performance hit in real world, well, because it's "only" 9%. Task manager and HWMonitor shows that core between 0 and 5% when both idling and/or stressing. Weirdly, Core#0 still shows that is consuming some Watts as on HWMonitor (probably for the second thread).

 

Like I said, a restart fixes it temporarily until it happens again (within a few days) until this happens out of nowhere and I need to restart it again. Please help.

 

Specs:

Windows 10 Pro 64 bit version 20H2 build 19042.928

Ryzen 5 3600

MSI X470 Gaming Plus Max (MS-7B79)

4x16GB Corsair Vengeance RAM

Corsair CS650M Bronze 650 Watts (oldest component, almost 7 years, I thought it could be that but the restart fixing it, kinda makes me think not)

GTX 1660 Super (stock clock)

A few SSD's

 

[Guest]

Does it do the same thing if you wipe the overclock and enable Precision Boost?

[bmcvl]

That's what I'll be doing now, I just wanted to post this because I found nothing like this happening to any computer and since it came out of nowhere after 1 year using this clock it feels like it's not it.

Since this problems is inconsistent af, I might only give feedback on a week or even a month until this happens again (if it happens).

[Guest]

I suspect it's voltage-related.  Enabling PB will tell you if it's dead or not.  CPU's have a targeted voltage for a reason.

[NekoBubbles]

@bmcvlwhat happens to the core #0 if you play a video game?

[bmcvl]

1 hour ago, NekoBubbles said:

@bmcvlwhat happens to the core #0 if you play a video game?

remains the same. doesn't get utilized

[NekoBubbles]

18 hours ago, bmcvl said:

remains the same. doesn't get utilized

Does the game run? Or does the PC crash cause if it runs fine then its a sensor malfunctioning. 

[bmcvl]

3 hours ago, NekoBubbles said:

Does the game run? Or does the PC crash cause if it runs fine then its a sensor malfunctioning. 

 

23 hours ago, bmcvl said:

I don't notice apps crashing

 

[NekoBubbles]

11 hours ago, bmcvl said:

 

 

Okay then its definitely a sensor fault then, my pet peeve of AMD CPU's is this type inconsistency happens with them is they are well made but the thing that seems to be consistently cheaped out on is sensors for them. AMD CPU's otherwise are 98%of the time almost perfect just QoL stuff seems to take a back seat for the pure performance. 

As to the issue of the sensor and issue with it not registering atm core #0 then is not knowing if its ACTUALLY died... But by the time that core actually dies hopefully you have saved up enough to replace or get a new CPU. 

 

[Mr.Briggs]

Are you running a VM? is the Hypervisor using that core?

[bmcvl]

On 4/29/2021 at 2:20 PM, NekoBubbles said:

As to the issue of the sensor and issue with it not registering atm core #0 then is not knowing if its ACTUALLY died... But by the time that core actually dies hopefully you have saved up enough to replace or get a new CPU. 

 

Dead sensor = CPU will die completely soon? Well, I still have 1 year left from warranty... If this is a hardware problem I will RMA it. RIP work until I get a new CPU though....

 

On 4/29/2021 at 3:08 PM, Mr.Briggs said:

Are you running a VM? is the Hypervisor using that core?

If I set up a 12 core VM, same thing happens on the examples above.

[Mr.Briggs]

14 minutes ago, bmcvl said:

Dead sensor = CPU will die completely soon? Well, I still have 1 year left from warranty... If this is a hardware problem I will RMA it. RIP work until I get a new CPU though....

 

If I set up a 12 core VM, same thing happens on the examples above.

Im not well versed in Virtual machines but i am aware of scenarios where you dedicate resources to the hypervisor, then assign remaining resources to VMs

im not sure if it helps, just considered that perhaps your Core0 is being reserved for that purpose, but it should have been readily visible

[NekoBubbles]

On 4/30/2021 at 2:58 PM, bmcvl said:

Dead sensor = CPU will die completely soon? Well, I still have 1 year left from warranty... If this is a hardware problem I will RMA it. RIP work until I get a new CPU though....

 

If I set up a 12 core VM, same thing happens on the examples above.

Its not automatically going to die soon but by the time you find out core #0 is dead you are going to be probably in need of a replacement anyways. As the only way you are going to know its failing is if video games that are CPU heavy start like crashing >.>

[bmcvl]

update 1 year and so later: faulty motherboard.