how much watt psu do i need?

hi i was wondering how much wattage i need if i overclock my gpu (sapphire vapor-x r9 290x) and CPU (intel i7 5020k 6-core). other main components; 2 240 gb ssd in raid0 for boot and main programs and 1tb hdd 7200 rpm for data storing, as rock x99s extreme 4 motherboard and 16 gb RAM from g.skill ripjaws 4 series ddr4-2666.
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  1. ShadowR34per said:
    You would need a good quality 650w- 750w power supply to be on the safe side.

    ok thanks man, i luckily already had a 750w 80+ platinum in mind
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