CPU temperature too high while pc is cold

[Eru-88]

Hello, from a couple of day my Cpu temp are too high in any situationz going for 70°C in the BIOS and 80/90 in Windows doing nothing with 5-9% usage. I tried to re-apply thermal paste and moving the radiator (NZXT Kraken M22 120mm) which is really cold, but nothing changed. The other parts are in the mid 30 to 40°C. The AIO seems to work, the pump is running, the hot water tube is slightly hot and the other is cold. If turned on on it's own the cpu plate get cold in seconds as expected. The pc is running from 4 year now and I have upgraded the AIO this february. 

 

Part list:

CPU: Ryzen 7 2700X

RAM: 2xCorsair Vengeance lpx 16GB 3000MHz

MB: Asus rog strix B350-I gaming

AIO: NZXT Kraken M22 120mm

GPU: Sapphire pulse RX 5700XT 

PSU: Corsair SF750 (I had a smaller case before) 

Case: NZXT H210i with included fan mounted as rear and top exhaust. 

Storage: I don't actually remember the full names WD blue something 1TB nvme ssd, a Crucial 1TB sata ssd and an Hard Drive also 1TB.

 

I searched online but I didn't find anything relevant or that i didn't  had already tried, maybe I searched with the wrong terms.

 

Thanks in advance just for the time spent reading and sorry for the bad english. I'm really getting crazy looking for this. 

[RONOTHAN##]

It might be that your mounting hardware is wrong/broken. Those temperatures are way too high. If the radiator is cold, heat isn't transferring from the CPU to the CPU block. The reason it wouldn't transfer are that a) the cooler isn't mounted correctly, either by user error or broken mounting equipment, b) the thermal paste isn't applied correctly, c) the plastic cover is still on the cooler, or d) the thermal paste you're using is awful. To better figure out what's wrong, can you send the following pictures and answer to following questions?:

1.) A photo of the cooler currently mounted (mainly of the CPU block)

2.) A photo of the thermal paste spread (by removing the cooler)

3.) Check to make sure you didn't leave the plastic on the cooler, no shame in doing that, it happens

4.) What thermal paste are you using?

[Eru-88]

Thanks for the quick response here the photo. 

 

Spoiler

I think I overdo a little with the thermal paste this time. 

For question 3, no the plastic was removed before the first installation, while for 4, at the moment is what remain of a Lepa tube that I don't remember how I got it and used for testing now, and ordered some good paste in the meantime, before there were the stock NZXT paste. 

[RONOTHAN##]

24 minutes ago, Eru-88 said:

Thanks for the quick response here the photo. 

 

  Hide contents

4.58 MB · 0 downloads

I think I overdo a little with the thermal paste this time. 

For question 3, no the plastic was removed before the first installation, while for 4, at the moment is what remain of a Lepa tube that I don't remember how I got it and used for testing now, and ordered some good paste in the meantime, before there were the stock NZXT paste. 

From what I can tell, the mounting hardware looks fine and it's installed correctly. The thermal paste application looks, good, and while you probably used slightly more thermal paste than necessary, I'd rather use more paste than less paste. I've never really heard of Lepa thermal paste, so that might be your problem. The stock NZXT thermal paste should've been fine, but the reason your temps were high with that might have been a bad mount or something similar. A repaste with something good like MX-4 or NH-1 should hopefully fix your issue. If it doesn't, I don't really know what else it could be, besides a dying pump or something similar.

[Montana One-Six]

7 hours ago, Eru-88 said:

Thanks for the quick response here the photo. 

 

  Reveal hidden contents

4.58 MB · 0 downloads

I think I overdo a little with the thermal paste this time. 

For question 3, no the plastic was removed before the first installation, while for 4, at the moment is what remain of a Lepa tube that I don't remember how I got it and used for testing now, and ordered some good paste in the meantime, before there were the stock NZXT paste. 

First of I don't know anything about NZXTs mounting hardware but looking at the second photo I have a feeling something is wrong. I have never seen a mounting bracket for a CPU cooler going on top of chips on the backside like that.

It seems like it could be a potential issue for mounting pressure.

Are you sure that mounting hardware is compatible with AM4 motherboards?

[Eru-88]

7 hours ago, RONOTHAN## said:

From what I can tell, the mounting hardware looks fine and it's installed correctly. The thermal paste application looks, good, and while you probably used slightly more thermal paste than necessary, I'd rather use more paste than less paste. I've never really heard of Lepa thermal paste, so that might be your problem. The stock NZXT thermal paste should've been fine, but the reason your temps were high with that might have been a bad mount or something similar. A repaste with something good like MX-4 or NH-1 should hopefully fix your issue. If it doesn't, I don't really know what else it could be, besides a dying pump or something similar.

The temperature are exactly the same as they were in the past two days with the stock NZXT paste, before it was 20°C over room temp on average in idle (so 45° for the past months). Today I also tried to start Linux in live (MX Linux) and the temperature seems to rise slower than even in the bios, but after 1 hour idling I'm at 56°. 

32 minutes ago, Montana16 said:

First of I don't know anything about NZXTs mounting hardware but looking at the second photo I have a feeling something is wrong. I have never seen a mounting bracket for a CPU cooler going on top of chips on the backside like that.

It seems like it could be a potential issue for mounting pressure.

Are you sure that mounting hardware is compatible with AM4 motherboards?

I double checked with the instructions and yes, it's compatible with AM4 and mounted correctly. 

Spoiler

[Eru-88]

I just found a... Thing. While the cpu is now around 60° from sometimes now, I was checking again the AIO to see if it still works and see the piece in the photo hanging thanks to a minuscule drop of thermal paste on the motherboard near the cpu area. Any idea of what is o if it can be related? 

Spoiler

 

[Montana One-Six]

1 hour ago, Eru-88 said:

I double checked with the instructions and yes, it's compatible with AM4 and mounted correctly.

So I guess it doesn't contact the chips then.

[Eru-88]

18 minutes ago, Montana16 said:

So I guess it doesn't contact the chips then.

If you mean the chips on the top left, no it have like a 1,5mm gap

[Eru-88]

UPDATE: 

Linux ended up stabilizing in the low 70°C, this night I've tried to get the pc running first whit the pump unplugged then with the AIO fan unplugged. Without the pump the temperature raised 2 degrees a second and reached 90°C in less then a minute. While without the fan, that was plugged in the CPU_FAN header it was slowly rising in the low 60 in the BIOS, so I tried to plug the fan in the NZXT Control Hub of the case and now is hovering from 55 to 66°C spiking up to the low 70° when opening app or similar. It's a little bit too noisy for the standard I was used to from my PC, but it's at least "usable".

Still, the problem persist and I don't know what to do next.