Screen goes black when playing games

[Jaggy42]

Hello, recently when playing games my screen go black and the system stops responding after a bit. Music continues to play for a bit, but then stops. While this happens my fans get very loud and the only way I get get my PC working again is to restart it. I started watching my temps, while my GPU stays mostly below 70C, my CPU runs at over 80 and I've seen it jump as high as 98 before the screen goes black. So, is high CPU temps causing these issues? If so, where can I get a new CPU cooler/thermal paste to fix the issue? I would also like to add the CPU I've noticed has always ran a bit warm, so I don't know if maybe I need a new kind of cooler.

Update: I used the HP Diagnostic Windows app to run each test. During the CPU stress the temps hit 98, but then throttled and went to 75ish. It passed each test.

[JJOcean]

With a CPU temp that high at the moment the screen goes black, you can pretty well be assured that it is a thermal shutdown. You can try reapplying paste to the CPU and while you are at it make sure the cooling fan is running properly and that the cooler is not plugged with dust. Give the inside of the system a good cleaning with compressed air (from a can as you do not want too much pressure). Also make sure that nothing is blocking the airflow in the case.

[Jaggy42]

Hello, I order some thermal paste and replaced what was there. However this has not changed anything, temps still reach the high 90's when under load. I also made sure get as much dust out of the case as I could, but there was really only build up on the intake fan. What else should I try?

[JJOcean]

Check the cooling fans to make sure they are not binding or plugged with dust. If you have liquid cooling then feel the tubes as you should be able to tell if liquid is flowing through them.

[Jaggy42]

None of the fans are binding, nor plugged with dust. Overall there's almost no dust left in the case/fans. I felt the tubes for the liquid cooling, and I believe I feel the liquid flowing. Do I need a new cooler?

[JJOcean]

If the fans look good and the radiator is not plugged with dust then something is not working properly for the temps to run that high. Not knowing how old the system is I have seen liquid coolers, after a period of time, where the water block can get plugged with sediment and prevent proper cooling. This YouTube video is a good source for information on AIO cooling systems. If the cooler is around 3 years old or so and depending on how many hours on the system, it may be time for a new cooler.

[Jaggy42]

I got the system a little over a year ago, however I have used it a lot. I noticed that the cpu always ran a warm, like 80ish under load, but not this bad until recently. So if a replacement is needed, do you happen to know of any better ones than the one that comes with the system?

[JJOcean]

Have a look at this forum page and at this YouTube video as both offer good information especially the video.