Need help with Psu rating

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What is the recommended amps on 12v rail for my system?

i5 3470
B75/H77 mobo (not yet decided)
Gigabyte GTX 660 oc
G.Skill RipjawsX 4gbx2
mid tower case with upto 6 fans (also not decided)
seagate barracuda 1tb
1 dvd rw
1 ssd
upto 4 usb devices will draw power

Extreme PSU calculator recommended a 450w supply for the above build, is it enough?
 
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clutchc

clutchc

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Apr 22, 2009
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The CPU is a 77W processor (6.4A), the GTX 660OC is ~140W (11.7A), the RAM will draw about 7A, 6 x +12V case fans will draw about 27A, the HDD about 10A, 4 x USB devices about 9A...

If you've been to a PSU calculator, you can guess-timate it yourself simply by watching the Wattage increase as you add a component. Amps = Watts/Volts.

A GOOD QUALITY 450W power supply should be 'adequate'. I'd go for 500W or better to leave room for upgrading.
 
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Arindam Adhikari

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May 21, 2013
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Thanks for the reply, I guess it will go for a 500w psu then
 
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