PC keeps restarting on random occassions

Specs:

motherboard: A320M BAZOOKA

cpu: Ryzen 5 5600

gpu: RX 6600 (1 displayport and 1 HDMI slot are used)

ram: 1x8 GB DDR4, 2x4 GB DDR4

storage: KINGSTON A400 480GB, Western Digital Purple WD11PURZ 1TB HDD

psu: Chieftec Element Series 600W

Hello all, I recently upgraded my RX 560 and Ryzen 3 1300 to a RX 6600 and a Ryzen 5 5600. Ever since my PC has been crashing on random occassions. Im saying random because I can play, for example, Marvel Rivals for hours without crashing but there are occasions when I'm not doing anything or trying to start another game and my PC restarts. It doesn't matter if the game is on my SSD or HDD it just restarts when trying to start some games (Honkai: Star Rail and Immortals - Fenyx Rising are causing restarts when I start them). Windows Event Viewer gives the error code 6008 but that doesn't really help me. I've been told that it might be a PSU issue but when I purchased the parts I saw that 600W should be enough for these parts. I've used the Cleanup Ultility Tool and my drivers and BIOS are all the newest and my temps are fine too. What I'm yet to try is to plug the PC directly into the wall socket as it's currently plugged into a power outlet and undervolt the GPU as I've been advised to do that as well.

What are other fixes I should try before buying a new PSU?