It might be ok but if it's a used unit for a few years I'd probably not risk your other parts and just grab a Seasonic Focus Gold.600 evga b1
600 evga b1Yea it should work fine and be a decent gaming system assuming you have the rest of the parts such as a case and storage although that PSU may not be good enough for that 390X. What is the exact model?
It might be ok but if it's a used unit for a few years I'd probably not risk your other parts and just grab a Seasonic Focus Gold.600 evga b1