High CPU temps, low cooler temp

[Paddo]

I built a PC with an i7 7700K on an MSI Z270-A PRO Motherboard with a be quiet shadow rock 2. My problem is that the CPU temps are in the 85°C-95°C but the cooler itself is not that warm, not hotter than 30°C maybe. 
The cooler is mounted correctly. But I noticed that the MOSFET heatsinks are super hot. Is it possible that the termalsensors are picking up the temps of the MOSFET or is it the cooler that doesn't sit right on the CPU?

[Jurrunio]

HWinfo can list data from all sensors. Maybe give us a screenshot of that?

[imreloadin]

13 minutes ago, Paddo said:

I built a PC with an i7 7700K on an MSI Z270-A PRO Motherboard with a be quiet shadow rock 2. My problem is that the CPU temps are in the 85°C-95°C but the cooler itself is not that warm, not hotter than 30°C maybe. 
The cooler is mounted correctly. But I noticed that the MOSFET heatsinks are super hot. Is it possible that the termalsensors are picking up the temps of the MOSFET or is it the cooler that doesn't sit right on the CPU?

If the heatsink isn't warm when the CPU is that hot them the heat isn't being conducted to the heatsink efficiently, so reseat your heatsink after cleaning off the old thermal paste from the CPU & contact plate of the heatsink and then reapply new thermal paste. Make sure that while securing the heatsink onto the CPU that you don't accidentally lift it up which can cause air to get in and cause bubbles which destroy conductivity.

Have you done any overclocking with it at all? If so check your voltages to make sure they're not super high (if you used auto settings for core voltage).

Also I'm guessing these temps are under full load?

The CPU temp is normally taken from a sensor on the CPU itself so it shouldn't be affected by VRM heat.

[Paddo]

2 minutes ago, imreloadin said:

If the heatsink isn't warm when the CPU is that hot them the heat isn't being conducted to the heatsink efficiently, so reseat your heatsink after cleaning off the old thermal paste from the CPU & contact plate of the heatsink and then reapply new thermal paste. Make sure that while securing the heatsink onto the CPU that you don't accidentally lift it up which can cause air to get in and cause bubbles which destroy conductivity.

Have you done any overclocking with it at all? If so check your voltages to make sure they're not super high (if you used auto settings for core voltage).

Also I'm guessing these temps are under full load?

The CPU temp is normally taken from a sensor on the CPU itself so it shouldn't be affected by VRM heat.

Done that 3 times now. No Overclocking. Yes, these temps are under full load with AIDA64. Idle temps are around 40°C with ambient temps in the mid 20°C.

 

6 minutes ago, Jurrunio said:

HWinfo can list data from all sensors. Maybe give us a screenshot of that?

Can't make a screenshot right now. Built that PC for a customer and I don't have access to it because it's at my workplace. HWinfo didn't list any CPU temps, only clockspeed and utilisation.

[Jurrunio]

26 minutes ago, Paddo said:

lace. HWinfo didn't list any CPU temps, only clockspeed and utilisation.

 

it should

[Paddo]

Oh, my bad. I used HWmonitor not HWinfo. But HWmonitor should've shown the temps too.
But AIDA and coretemp showed the same temps. Guess I'll switch to a stock cooler and see if the temps get any better.

[AJTerminator]

Yeah, Paddo, just make sure that you're using A) A good thermal compound that could be the issue and B) Make sure for Rookie mistakes, Like leaving the plastic film on the bottom of the cooler and making sure that you are actually using enough (LTT did a video on thermal compound application if you dont know how)

[Ace McPlane]

On 3/16/2018 at 10:37 PM, Paddo said:

Oh, my bad. I used HWmonitor not HWinfo. But HWmonitor should've shown the temps too.
But AIDA and coretemp showed the same temps. Guess I'll switch to a stock cooler and see if the temps get any better.

are you sure the bracket that goes on the back of the motherboard for the cooler to screw into is installed correctly? Maybe the posts on it aren't screwed down all the way or maybe it's in crooked or something.

Long shot, but something to check anyhow.