Good quality 450 W unit will suffice, but buy a good quality one, not some no-name garbage. I highly recommend the Corsair CX450 if you got the budget for it. Use this Tier list for seeing if a unit is good enough or not, I would not recommend going below Tier B for your system: https://linustechtips.com/main/topic/1116640-psucultists-psu-tier-list/
Good quality 450 W unit will suffice, but buy a good quality one, not some no-name garbage. I highly recommend the Corsair CX450 if you got the budget for it. Use this Tier list for seeing if a unit is good enough or not, I would not recommend going below Tier B for your system: https://linustechtips.com/main/topic/1116640-psucultists-psu-tier-list/