80+ certification doesn't state if the PSU is safe to use or not, it only states PSU's efficiency.
Though, lower efficiency PSUs usually doesn't have solid build quality but that is not always the case. There are 80+ Gold certified PSUs out there which build quality is far worse than 80+ Bronze certified PSU. Here, you need to know which PSU makers are good and which are not. Sadly for you, Cooler Master Masterwatt Lite PSU is low quality PSU and i wouldn't use it.
For good quality PSU, anything from Seasonic will do just fine. For you, in 600W range. Your GPU is 180W, add the rest of the system at about 200W and total would be about 380W. 600W unit is more than enough, even for OC.
E.g S12II-620, M12II-620 EVO, G-650 or Focus+ 650,
pcpp: https://pcpartpicker.com/products/compare/WrNypg,nB3RsY,Tc3RsY,R7V48d/
Focus+ is the newest PSU line from Seasonic and it comes with 10 years of warranty.