CPU (AMD 5800x) Gets hot then lowers and repeats

[Samcpfc]

Hello,

So I've reinstalled windows fresh and even put on a new heat-sink (Noctua DH15) my processor whilst idle ramps up to ~67c and then lowers back down to ~45c  every couple minutes or so. I'm not sure why, nothing shows in taskmanager as taking a lot of processing power. I have stress tested using Cinebench and it doesn't seem to go about 82c but I have noticed whilst playing Minecraft it breached 90c which is terrible.

Any ideas? Is my CPU dying?

All standard clock speeds. Haven't touched the PC properly for 18 months due to being away.

 Here's HWMonitor after a short ~30 minute Minecraft session

[Fasauceome]

20 minutes ago, Samcpfc said:

Any ideas? Is my CPU dying?

Most likely, no. You would not expect temperature fluctuations with a bad CPU, but the motherboard might be to blame.

 

In the BIOS, do you have your fan curve set to a specific setting? If it's default, perhaps consider changing the fan curve to "silent"

[Samcpfc]

16 minutes ago, Fasauceome said:

Most likely, no. You would not expect temperature fluctuations with a bad CPU, but the motherboard might be to blame.

 

In the BIOS, do you have your fan curve set to a specific setting? If it's default, perhaps consider changing the fan curve to "silent"

Haven't touched any of the fan settings in the BIOS. I will have a look and report back.

[Samcpfc]

2 hours ago, Fasauceome said:

Most likely, no. You would not expect temperature fluctuations with a bad CPU, but the motherboard might be to blame.

 

In the BIOS, do you have your fan curve set to a specific setting? If it's default, perhaps consider changing the fan curve to "silent"

So after some testing at idle it sits above 70c. I'm not completely sure how it's gotten worse. I've attached some photos of fan settings I've tested so far alongside idle temps from HWMonitor.

 

I'm going to reboot in safe mode. Maybe there's something that is causing it and I can't tell. Temps do seemingly drop when I kill windows indexing's process, however that could be a coincidence.

 

EDIT: I realise now that the drivers don't start obviously so I can't tell the temps in safe mode

IMG_1742.HEIC IMG_1744.HEIC IMG_1745.HEIC IMG_1746.HEIC

Edited January 28 by Samcpfc

[Fasauceome]

1 hour ago, Samcpfc said:

I'm going to reboot in safe mode. Maybe there's something that is causing it and I can't tell

1.44 volts for the CPU at idle is not to be expected. It does look as though something is using your CPU.

 

In task manager, disable every program that opens on startup.

[Samcpfc]

34 minutes ago, Fasauceome said:

1.44 volts for the CPU at idle is not to be expected. It does look as though something is using your CPU.

 

In task manager, disable every program that opens on startup.

Something seems to make it jump up to >1.44v still with everything in start up disabled in task manager. Also just want to say, thank you for continuing to help me, i really appreciate it.

 

EDIT: Just want to add, windows hangs for a couple seconds after signing in.

Edited January 28 by Samcpfc

[Levent]

Tweak your voltage curves. My first 5800X which was an earlier variant, that would also run extremely hot and require voltages like those. Curve Optimizer tweaking is pretty much a necessity with Zen3 chips.

[Samcpfc]

7 minutes ago, Levent said:

Tweak your voltage curves. My first 5800X which was an earlier variant, that would also run extremely hot and require voltages like those. Curve Optimizer tweaking is pretty much a necessity with Zen3 chips.

Please forgive my ignorance. I am not familiar with how to do that and I'd like to make sure I don't destroy anything in the process. Is there any tutorial you recommend and and ideal voltage I should try? I'm using an msi x570x tomahawk

[Levent]

2 minutes ago, Samcpfc said:

Please forgive my ignorance. I am not familiar with how to do that and I'd like to make sure I don't destroy anything in the process. Is there any tutorial you recommend and and ideal voltage I should try?

Well curve optimizer is used for adjusting voltage curve of the CPU under various loads and frequencies. Its not a static voltage. It takes a while to tweak it but having lowest (highest negative curve) usually yields in more performance due to reduced thermal restrictions. PBO tweaking is optional but I would highly recommend it.

 

[Samcpfc]

Just now, Levent said:

Well curve optimizer is used for adjusting voltage curve of the CPU under various loads and frequencies. Its not a static voltage. It takes a while to tweak it but having lowest (highest negative curve) usually yields in more performance due to reduced thermal restrictions. PBO tweaking is optional but I would highly recommend it.

 

Thank you very much. I will take a crack at it when I can. It's getting quite late in the UK and I should definitely be less tired when I do this.

[Blue4130]

6 hours ago, Samcpfc said:

Thank you very much. I will take a crack at it when I can. It's getting quite late in the UK and I should definitely be less tired when I do this.

AMD Ryzen master software has an automatic curve optimizer that works surprisingly well. Basically one click and let it do its magic. It isn't as fine-grained as doing it manually, but it makes it dead simple to use.

[Samcpfc]

2 hours ago, Blue4130 said:

AMD Ryzen master software has an automatic curve optimizer that works surprisingly well. Basically one click and let it do its magic. It isn't as fine-grained as doing it manually, but it makes it dead simple to use.

Amazing, I’ll install that and see how it all goes

[Samcpfc]

4 hours ago, Blue4130 said:

AMD Ryzen master software has an automatic curve optimizer that works surprisingly well. Basically one click and let it do its magic. It isn't as fine-grained as doing it manually, but it makes it dead simple to use.

I don't want to speak too soon, but from the stress testing that I've been doing it seems to have mostly worked! Thank you for your help!