Do I have the right amount of wattage or too little

Tenslaster2980

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Feb 16, 2014
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I'm building a gaming PC, and I don't know how much wattage I SHOULD get. It says estimated 281 watts, but I got a 500 watt power supply. Is this enough or too little? Here's the breakdown.
CPU

AMD Athlon X2 370K 4.2GHz Dual-Core Processor
CPU Cooler
Evercool HPQ-12025 75.1 CFM CPU Cooler
Motherboard
Memory
Kingston HyperX 12GB (3 x 4GB) DDR3-1600 Memory
Storage

Western Digital Caviar Green 1.5TB 3.5" 5400RPM Internal Hard Drive
Video Card

Asus Radeon R7 260X 2GB Video Card

EVGA 500W 80+ Bronze Certified ATX Power Supply
 
That PSU should be fine for those parts.

By the way, the WD Green HDDs end up being a bit slower and more expensive than the WD Blue. The advantage of the Green is that it runs quieter and turns off to conserve power when not in use. It's primarily meant for "green" computers.