200 watt TDP so you'd need 400w for just your GPU's. Then add headroom, CPU-and if OC, peripherals and fans and cooling.
I'd look at 700w+ bronze or higher 80+ rated PSU's. Modular for nice cable management.
SeaSonic, Corsair, Antec, NZXT, CoolerMaster, ThermalTake...etc are trustworthy PSU manufacturers.
Your motherboard has 2 PCIe 3.0 x16 slots. So yes your motherboard supports it, just make sure your Cards take up no more than two slots-because some coolers take 2.5-3.
Also, some good companies make bad products
So always read about the card-and not buyer reviews but real reviews.