My pc shutdowns when loading AAA titles games. I even see FPS drops while playing competitive games like League of Legends and Valorant. It all started a month ago, firstly my hard disk randomly didn't show up after the boot. Then it started making clicking sound. First I thought It was hard disk issue, then I tested the hard disk using HDD sentinel and everything was fine. While testing I found something new, in idle I saw my LED on CPU cooler which is a static LED, randomly gets dimmed like it is struggling to get power. But when pc is on load, LED lights up again. It seemed odd to me as it is just a normal LED without any LED effect. It has only 2 power pins that are directly connect to MOLEX connector. Recently while playing Risk of Rain 2 (comparatively light game) is something weird again. My HDD is gets disconnected and reconnects again approximately every 15-20 min. And finally while playing Forza Horizon 5, game suddenly froze where previously this game ran smoothly with ultra settings reaching 75+ fps. I tried with NFS Heat, my pc just completely shutdowns while loading that game. I played NFS heat on release. It ran pretty well then considering its low optimization. I did some more testing. I used AIDA64 and ran CPU stress test for 10 mins, everything seemed fine no throttling, temps were only reaching 67-70 degree Celsius. Then I tested GPU using MSI Kombustor. For 3-4min everything looked fine. Temp reaching only 70 degrees Celsius. But suddenly bluescreen. I tried the test again. Everything was fine this time. So started AIDA64 and Kombustor simultaneously. This time after 3-4min pc crashed with bluescreen. After time of this test was going on for a moment there was a clicking of hard disk. So can someone give me advice what part can be issue for this problem? I am thinking the PSU but still some advice will be helpful.
My PC spec:
Intel 6700k
Gigabyte B250 motherboard
Ram 32GB 3200mhz
GPU Zotac Nvidia 1660
SSD Samsung 970evo Plus
HDD Seagate 2TB 7200
HDD Toshiba 1TB 7200 Laptop
PSU Thermaltake 630w Smart