PCPartPicker part list / Price breakdown by merchant
CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($172.89 @ OutletPC)
Motherboard: ASRock H97 Anniversary ATX LGA1150 Motherboard ($71.89 @ OutletPC)
Video Card: Sapphire Radeon R9 390 8GB Nitro Video Card ($304.99 @ Newegg)
Total: $549.77
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-11-15 17:27 EST-0500
A bit over budget but it's worth it but push come to shove and you can't afford, you could probably get away with a FX for 1440p