PCH Diode high temperatures

[TheNope]

Hi everyone,

Here are the specs,

Aorus Master x570
Ryzen 9 5900x @ 4GHZ

4 sticks of 8gb Trident Z Neo @ XMP 3733MHz
Aorus Master RX 6800XT (not overclocked but sometimes I enable the rage mod in WARZONE)

Corsair HX850i

At idle temps are amazing GPU 29-36, CPU 35-40
While gaming 45 - 65(rarely) GPU 55 - 70 (70+ rarely depending on the game)

BUT, PCH diode almost never goes below 70, and when gaming goes around 80-82

I am trying to figure out why my pc does random restarts, so thinking this could be one of the problems. Initially I thought it's a PSU problem and needed an upgrade so temporarily disconnected few RGB accessories, dropped CPU 4.2 to 4GHZ and 3800MHz to 3733MHz not to stress my PSU until I get a 1000W. Haven't had any restarts for almost 2 months, today had 3 restarts in one day. PSU is 5 almost 5 years old. All other parts in PC are less than a Year old. Any suggestions or ideas are welcome and thank you in advance for the time:)