Question Pc shuts off when playing a game

[AscendantLag]

Idk where else to post this so sorry if wrong place but recently ive changed my case and my pc keeps shutting off when i try to play something and wont turn on unless i turn the switch off and on after a few seconds. Ive tried reseating ram one at a time hasn't worked. I haven't had this problem since the case change and temps are perfectly fine. IM LOST

 

[rgd1101]

full system spec? include make and model of the psu

 

[AscendantLag]

rx 580 8gb
ryzen 3600
psu is corsair cv 550
b450m a
hyperx 16gb 2x8 3200
tecware nexus m is the case

 

[AscendantLag]

also the mobo lights stay on when the pc shuts down