Extreme CPU temperatures in Cinebench multi-core test

[TheThe]

My CPU core temps on idle are normal I think, ranging from 32C to 39C. But... I ran the Cinebench multi-core test and the temps rose to 100C in like 5 seconds. The second I turn it off the CPU temps go down to idle temps. On the single-core test, I get something like 60C to 70C.

I double-checked that the cooler is mounted properly, that the plastic film is removed and that the thermal paste is spread well. I use XMP profile and disabled MCE.

 

Parts:

• i9-10850K
• MSI Z490 MAG Tomahawk
• Arctic Liquid Freezer II 280
• Cooler Master TD500 Mesh

 

I don't have a GPU yet, so I'm using the integrated Intel graphics now if that matters.

 

What could be the issue?

[dogwitch]

is aio now or used?

have you check the mobo defult settings?

power management settings in win 10?

[jaslion]

Is the rad higher than the pump for at least some part?

[Helpful Tech Witch]

Can you hear the pump? Do you have fan spin?

[TheThe]

7 hours ago, dogwitch said:

is aio now or used?

have you check the mobo defult settings?

power management settings in win 10?

The AIO is brand new. I'm not sure what to check, but I did not change much. Just tried to enable XMP (which I later disabled) and disable MCE.

What should I look for?

 

7 hours ago, jaslion said:

Is the rad higher than the pump for at least some part?

 

7 hours ago, HelpfulTechWizard said:

Can you hear the pump? Do you have fan spin?

Not really, but the case fans are not completely silent even on low rpm. I do see that the VRM fan on the pump spins.

 

[LogicalDrm]

Can you show some system specs while test is running? Just to make sure. I think your cooler is fine, it should show bad temps in other stressing as well. But this might be issue on voltages.

[TheThe]

Here are the stats from CPUID HWMonitor:

 

 

[AngryBeaver]

Can you show us what the vcore is too. It could just be a bad mount or you forgetting to take the plastic strip off the cpu block

[TheThe]

You can see the vcore at the top under voltages in the first image. Or do you mean something else?

And I did remove the plastic.

[TheThe]

I re-mounted the block today just to make sure (which did not help). But I took the chance to take these pictures:

 

[Jeppes]

And you are using the correct standoffs? That looks like horrible contact.

[TheThe]

2 hours ago, Jeppes said:

And you are using the correct standoffs? That looks like horrible contact.

Wow, you were right!

I mean, I was using the correct standoffs (the other ones don't fit), but I tried to tighten the thumb nuts a bit more and now the temps max out at 85C.