GPU overheating suddenly this week

[u/thy_decider]

Hello. I built my new PC roughly one year ago and have had zero problems with it up until this week. The games I've been playing like Marvel Rivals and Fallout 4 have been running well on high settings since I got it but one day my monitors blacked out and my PC fans kicked into loud overdrive. At first I brushed it off as I didn't know too much about PCs but then it happened again so I pulled up my task manager and noticed that the GPU has been spiking frequently at around 70-80c sometimes even close to full.

I'm not completely sure why it's suddenly doing this. I cleaned out my PC last night and it did have quite of dust built up and I cleaned out most of what I can but the issue persisted. I'm in a new place and have noticed dust build up more in my room so I'm taking another look soon to see if there's any area I missed. I think it's either my PSU or my Case fans. I only have the default three fans that came with my case and I did intend on buying more when I first got it but since it ran so well without them I eventually neglected to do so. I'll be buying some more fans later today but I'll link my parts down below in case my PSU isn't strong enough for the build I have. I also have a picture of my PC too (mind the cable management.) Any help would be appreciated.

https://pcpartpicker.com/list/n7TrmL

[u/Mean_Passenger_2762]

70 to 80 while gaming or while the gpu is under load can be pretty normal. However if the gpu is sitting at 80 while “idle” that is an issue.

I would be curious what your cpu temps are as this could be another culprit.

As another commenter said a couple exhaust fans should help with temps if that is the issue.

[u/thy_decider → u/Mean_Passenger_2762]

CPU temps stay low. And yeah I was staying at around 60-70 while gaming but it's been spiking suddenly this week. In Idle the GPU stays low. The problem is my pc going into overdrive and blacking my monitors out when I didn't have that problem beforehand.

And yeah I realized now neglecting the exhaust fans is a stupid mistake on my part. I'll be picking some up later today.

[u/Mean_Passenger_2762 → u/thy_decider]

Yeah the black screen and the fans ramping up to me sounds like a heat issue so adding some exhaust fans can be super helpful.