How many watts do I need?

[4ndrew]

Hello!

 

As the title says, I am stuck trying to work out what PSU I will need.

 

Differant PSU wattage calculators have given me results from 530w to 730w. Here is the build: http://pcpartpicker.com/p/phXDf7

This has left me unsure what I will actually need to run this pc with mild  overclocks on the CPU and GPU.

My budget for a PSU is pretty low though at £45 most (I'm in the UK).

 

If I need less than 550w then I'll probably get this:http://www.scan.co.uk/products/550w-cooler-master-gm-series-hybrid-modular-80plus-bronze-1x120mm-atx-v231-psu

 

If I need more then the best thing I can find is http://www.scan.co.uk/products/750w-corsair-cx750m-hybrid-modular-80-plus-bronze-1x140mm-atx-psu

 

Any help is appreciated!

 

Thank you for reading!

[ZetZet]

You need 600++.

[thekeemo]

I can run my 290x off of 600w but with the 8320 you should probably go for 750

[Enderman]

550W is enough for that system, but i recommend some other brand than coolermaster for the PSU

evga, seasonic, and corsair are all better options

[4ndrew]

600+W is enough for that system, but i recommend some other brand than CM for the PSU

evga, seasonic, and corsair are all better options

Thanks, so is this a good option: http://www.scan.co.uk/products/600w-evga-600b-80plus-bronze-1x120mm-silent-fan-atx-psu

[thekeemo]

550W is enough for that system, but i recommend some other brand than coolermaster for the PSU

evga, seasonic, and corsair are all better options

thats the corsair CX750 a very decent PSU

[Fulgrim]

Why not go for an i5 4690k + R9 290? 

[Untouchable]

The Lightning card is pretty power hungry, but you can get away with a 550w to 650w psu. Just be sure to go with a good brand. Otherwise your power supply could die on you, and you don't want that. 

[ForsakenLive]

550W is enough, I'd get just a tiny bit more for headroom (not to expand more, but to not have the unit near full load which is hot and noisy) A 650W PSU is more than enough.