What wattage should i need?

[T2]

AMD FX-6300
GIGABYTE AMD R9 280 WINDFORCE OC
MOBO ASUS M5A78L-M/USB3
4X2 Corsair vengeance
1 TB HDD
1 Optical drive
3 usb ports
3 cabinet fans
Cooler master 212X CPU cooler

 

[MeteorsRaining]

A 500W or higher decent quality unit will do fine. SeaSonic 520W, XFX 550W, Antec 520W are some good choices.

 

[T2]

A 500W or higher decent quality unit will do fine. SeaSonic 520W, XFX 550W, Antec 520W are some good choices.

Is the corsair vs650 a good choice?

 

[MeteorsRaining]

Wattage wise yes, quality wise it's the poorest amongst Corsair PSUs, avoid it.