What Gaming PC PSU should I buy?

Confused Idiot

Reputable
Jan 9, 2015
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I need a power supply, I don't mind the energy cost, I need to know how many watts my system takes, I looked at calculators but they all give different results. This is my first build so I just want to know how many watts this will take. I dont mind getting a 600 watt psu if it is 540 watts for example. My build is listed below:

(Try to keep it corsair, seasonic, or antec psu's)

CPU
Intel Core i5-4460 $189.98 *
Motherboard
ASRock H97 Anniversary $71.95
Memory
G.Skill 8GB $72.97
Storage
Seagate 1TB 7200RPM $54.88 *
Video Card
Sapphire Radeon R9 280X $249.99 *
Case
Deepcool TESSERACT SW $45.98
Power Supply
I don't know
Asus DVD-E818AAT/BLK/B/GEN $17.94
Operating System
Windows 8.1 - 64-bit (OEM) (64-bit) $99.98 *
Monitor
LG 22M35D 22.0" $119.99
Wireless Network Adapter
TP-Link TL-WDN4800 $36.83
Keyboard
Cooler Master CM Storm Devastator Gaming Bundle $24.99
Subtotal: $1048.48
* Mail-In Rebates: $65.00
Total: $983.48