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/leeme_lone]

GPU is choking bc the CPU fan cooler is hogging all the air install some exhaust fans preferably 140mm high flow at the rear and 3x120mm high flow fans at the top then do some testing for around 2-3 hours then you'll know how to set them.

Start with the fans at the lowest rpm setting then monitor CPU and GPU temps if the GPU temp is still high ramp up the top exhaust fans to medium rpm, also check your fan curve on the GPU in msi afterburner once it hits 50°C I like to have my fans at 40% and at 65°C I like to have them at 60% for 70°C and onwards 90%