Is my psu good enough?

[paxieishere]

Would the M12II-EVO620 power up a 390x nicely?

 

[Random_tech]

yeah, it will work, but you are getting to the limit of your psu

 

[Darkbreeze]

What CPU are you running?

 

[paxieishere]

i7 3770k

 

[Darkbreeze]

Ok, so older i7, no Haswell low power state requirements. You should be fine. If you're overclocking the CPU and GPU card, I'd really consider a high quality 750w unit though.