graphics drivers randomly uninstalling

[HoustonsProblem]

Hello,
yesterday I replaced the thermal compound on my 2400g and, when doing a stress test, my PC crashed. when it rebooted, the video drivers were uninstalled. The CPU didn't overheat, aida64 said it peaked 75c. There was an issue where I had to move a stick of memory from one slot to another (I have 3 sticks on that system) and reinstalling the drivers for the card hasn't shown any more issues, but if anyone knows what could have caused it I would appreciate it so I don't have the issue again.
The system in question:
Aresgame 750w
B450m pro vdh
2400g w/ stock cooler
3x 8gb ddr4 2666 cl 19 memory
kingfast 512gb SSD, seagate 250gb HDD+hitatchi 250gb HDD
R9 380x
Generic wifi card, advertised as 600 mb/s