280x with 550 watt psu?

Solution
OK, now from that link, you can see the expected power requirements:

AbDlRxI.png


Since yu chose a good PSU, and in general systems use much less than the maximums, I'd say you are in good shape.

arxios

Reputable
May 30, 2015
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4,520
PCPartPicker part list / Price breakdown by merchant

CPU: AMD Athlon X4 860K 3.7GHz Quad-Core Processor ($91.98 @ NCIX)
Motherboard: Gigabyte GA-F2A88XM-D3H Micro ATX FM2+ Motherboard ($79.99 @ NCIX)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($62.95 @ NCIX)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ NCIX)
Video Card: Club 3D Radeon R9 280X 3GB royalQueen Video Card ($259.95 @ NCIX)
Power Supply: EVGA SuperNOVA GS 550W 80+ Gold Certified Fully-Modular ATX Power Supply ($99.98 @ NCIX)
Total: $654.84
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-09-19 11:20 EDT-0400