How much PSU wattage do i need for my R9 270x?

[Finger Dally]

Hi! please help me, how much wattage of PSU do i need for my build?. I tried the PSU calc but am not sure/satisfied with the result, so here are the components of my future build.

MoBo: Gigabyte GA-990FXA UD3 (Rev 4.0)
CPU: AMD FX 6300 3.5 GHz Black Edition
Graphics Card: Sapphire R9 270x Toxic 2G GDDR5
RAM: G.Skill Sniper 8gb (4x2gb DDR3 1600Mz)
HDD: WD Caviar Blue 1TB
ODD: DVD
PSU:??

Planning also to put PCI wifi adapter, 240mm Radiator, 4 LED fans, LED strips and i might OC it (up to 4.0GHz or not it depends) in the future. Thanks!

 

[rolli59]

500watts with 2 PCIe power connectors is what is recommended! http://www.realhardtechx.com/index_archivos/Page362.htm Any quality 500-550 watt will handle it.

Good price after MIR http://pcpartpicker.com/part/antec-power-supply-neoeco520c