BitFaisal

I would try running every driver update you can find on your motherboards support page, as well as any bios updates for it

Hmm, same power supply dies twice, so thanks to your complete lack of variables or information we can only assume one of these factors:
 
You enjoy using the psu as a convenient coaster for ice-cold drinks It's plugged into the wall using forks and electrical tape It's a bad PSU Unfortunately, a 7980xe and 2080 ti SLI is just too much for this poor little PSU After the morning ritual of hucking it out a second story window, it just died for no particular reason The wiring in your house is awful, and you have constant thunderstorms with no surge protector

return it and get a different one.
 
simple. 
 
not worth thinking about