Hey everyone, I'm having a frustrating issue with my newly built PC. I put it together just a few months back, but today it started turning on and then shutting down right away. Sometimes I manage to get into Windows and even open a few programs, but it still powers off completely. I've opened up the case and double-checked all the connections, and even re-seated the GPU and RAM. I tried booting with each RAM stick separately, but the problem persists. I'm really stumped about what could be causing this. Here's my build: AMD Ryzen 7 9800X3D CPU, Noctua NH-D15 cooler, Gigabyte B850 AORUS ELITE WIFI7 motherboard, 64 GB of Silicon Power DDR5 RAM, a 4 TB WD_BLACK NVME SSD, a PNY OC GeForce RTX 5080 GPU, a Fractal Design North case, and a be quiet! Pure Power 12 M 1000 W power supply.
1 Answer
Have you checked the thermal paste on your CPU? Sometimes if there’s not enough paste or it's applied incorrectly, it can cause overheating and lead to shutdowns.

I do have a liquid cooler, and the LED screen shows 60°C. Could the paste still be a problem even if the temperature looks okay?