Question CPU overheating no matter what I've tried ?

[HTSeeley]

My i7-9700k keeps overheating, throttling, and then underclocking like crazy. I have tried cleaning, TIM reapplication, AIO testing, undervolting, etc. I'm at my wits end. Do I need to just buy a new cpu?

 

[Moonstick2]

It's very likely the AIO. What model do you have? How old is it? How is it installed in your case (the location of the radiator relative to the CPU matters)? Did the temps used to be okay with it?

You say you've tested it, but how do you know the pump is working? Can you feel heat in the pipes going to the radiator?

 

[HTSeeley]

It's very likely the AIO. What model do you have? How old is it? How is it installed in your case (the location of the radiator relative to the CPU matters)? Did the temps used to be okay with it?

You say you've tested it, but how do you know the pump is working? Can you feel heat in the pipes going to the radiator?

All I know is that is says rosewill on it. It is 4 years old. It is top mounted with the tubes facing the front of the case. I never really looked at temps until now since it's become much slower. As such, I can't speak on past Temps. I will say it has felt slow at times in the past but it's really struggling now and it will underclock to 1.3GHz at times.

One tubes is warm and the other is cool. After gaming one is hot and the other is warm. I don't know where the pump is, but I have tried, in vein, to manually increase the fan speed along with the other things I mentioned in the OP.

I will receive the Peerless Assassin 120 today and will test that. After that, all I can think of is to replace the CPU. I'm a novice, so I don't know if that is the right thing to do.

 

[rickypicky5]

What is the make/model of your motherboard? Did you buy the i7-9700k new or used?

 

[HTSeeley]

New, Asus TUF Z390-PLUS GAMING (WI-FI)

 

[Eugene$$]

Buy air cooler instead

 

[HTSeeley]

Buy air cooler instead

That's what the Peerless Assassin 120 is. However, I'm not sure how that will help me because I am going from 50s to 100s in a second or two. If it wasn't throttling to <2GHz it would melt.

 

[Moonstick2]

Typically given lifespans for AIO are 3-5 years with a potential of up to 10. Four years doesn't sound like an unlikely time for the cooler to have given up.

(There's an assumption here, since you've not mentioned otherwise, that you're not running custom clock settings or anything like that.)

A good air cooler is perfectly capable of cooling a 9700K so it should help. With an air cooler, there's very little to go wrong: provided you install it correctly and you can see the fan whirring you know it's working, so if you still have problems you'll know it's the CPU. About the only thing I can think of there is the interface between the die and the IHS might be damaged.

 

[falcon291]

The problem seems to be with your water pump. Replace it with an air cooler or another AIO. You will befine.

Before that you may try to clean and reapply thermal paste, but such an increase in temperatures is only possible with a not working water pump.

 

[HTSeeley]

Thank you all. Installing the new peerless assassin worked. The temps are great on stock cpu settings.

I do have one other issue. The fan labeled Chassie fan keeps reporting that it is going from normal speed to zero and back again every 10 to 20 seconds.

 

[DSzymborski]

Glad the new one note.

Just for the sake of posterity, since I didn't see this thread until later, that one tube was warm and one tube was cool is a *very* bad sign. The delta between the liquid going into the radiator and the liquid coming from the radiator is only a couple degrees of Celsius which you should not be able to feel. Just like you blowing on a hot drink, air can't transfer heat off a radiator that quickly, so AIOs get results by having a high flow rate rather than instant cooling at the radiator. In other words, a little bit of cooling done very fast. Having one warm tube and one noticeably cooler tube is a very good sign that the pump is failing or has failed.

 

[Rexer]

Buy a cooler instead. Thermalright Peerless Assassin. Cheap. Will do you well.