Does this seem like a good build?

Solution
I'd go with 2x4Gb or 2x8GB RAM.
Dual Channel does influence performance.

You could go for a Seasonic G or XFX TS PSU.
While the EVGA G2 is great the two mentioned won't perform any worse not will they break any sooner and are usually a few $ cheaper

RCFProd

Expert
Ambassador
Purely based on your choice for core components, which cost 728 dollars, I'd get this instead:

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-7400 3.0GHz Quad-Core Processor ($194.99 @ NCIX US)
Motherboard: ASRock B250M Pro4 Micro ATX LGA1151 Motherboard ($82.98 @ Newegg)
Memory: G.Skill NT Series 8GB (2 x 4GB) DDR4-2400 Memory ($51.99 @ Newegg)
Storage: Kingston SSDNow UV400 120GB 2.5" Solid State Drive ($45.49 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($49.75 @ SuperBiiz)
Video Card: PowerColor Radeon RX 480 4GB Red Dragon Video Card ($191.99 @ SuperBiiz)
Case: Deepcool DUKASE V2 ATX Mid Tower Case ($52.99 @ SuperBiiz)
Power Supply: SeaSonic S12II 620W 80+ Bronze Certified ATX Power Supply ($49.99 @ B&H)
Optical Drive: LG GH24NSC0B DVD/CD Writer ($14.88 @ OutletPC)
Total: $735.05
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-01-09 07:41 EST-0500
 
I'd go with 2x4Gb or 2x8GB RAM.
Dual Channel does influence performance.

You could go for a Seasonic G or XFX TS PSU.
While the EVGA G2 is great the two mentioned won't perform any worse not will they break any sooner and are usually a few $ cheaper
 
Solution