how long does a 850w 80+ gold psu last?

i bought this one off of amazon and i had it in my pc since january 2021, i have a ryzen 7 3700x and an rtx 3080 with 32gb ram.

i’ve been experiencing some weird crashes lately while playing r6 which is crazy, because i haven’t crashed for the first few days of playing where i started the game like last week

it’s not a problem with my gpu’s temp because it’s in mid 70s to low 80s, my cpu is fine and i reset my whole pc and it still crashes on r6. is this a psu problem and is it time to change it? lmk