Enough power?

[jonsey18]

I've chosen a 900w powersupply but I don't actually know how much I need.
For these components Roughly how many watts do you think ill need If I also plan to overclock?
 

GTX670

3570k

120SSD

Asrock Z77 Extreme4

[joelthezombie15]

no that is way more than enough

 

a 600w would even be a bit more than you need but when PSU's are at half load is when they are most efficient 

[Guest]

You'll hit at a guess 420 maybe at max. 

 

This is the only calculator I trust: http://extreme.outervision.com/psucalculatorlite.jsp

[XiaoPigs]

A 650W PSU will be more than enough even if you plan on overclocking. The only thing that this limits is you won't be able to add another GPU :)

[WoodenMarker]

This psu will do fine: http://www.newegg.com/Product/Product.aspx?Item=N82E16817151096

[jonsey18]

Mean cheers guys :D

[Akula]

550-650w is all thats required unless SLI/Crossfire.

[mgsstar]

A 650W like a SeaSonic X Series X650 would be enough to power your build if you plan to overclock.