What PSU do I need?

[SniffySnoo]

PC build: http://pcpartpicker.com/user/SniffySnoo/saved/bPsnTW

 

[jaraldo]

The r9 270 uses 142w at peak and your CPU uses 95w.
http://www.tomshardware.com/reviews/geforce-gtx-750-ti-review,3750-21.html

A 550w would be a good choice. Antec, XFX and Seasonic are good brands to choose from.

 

[jaraldo]

Here's one for $55
http://www.superbiiz.com/detail.php?name=XFX-550S&c=CJ

 

[zannymonkey]

AMD reccomends at least 500W psu with at least 30 amps +12V. Something like a 650W would give you a enough headroom, if you want to do crossfire in the future, just get 700+W so you won't need to upgrade the psu in the future. From my experience, do not get the absolute cheapest PSU on the market. Find something in the upper middle price range from a well known company (Antec, Corsair, CoolerMaster, Seasonic, etc).

Good Luck!

 

[TehZaman]

This will be perfect, It has 49A on the 12V rail http://www.amazon.com/EVGA-80PLUS-Bronze-Certified-100-B1-0600-KR/dp/B00EON40CS/ref=sr_1_1?ie=UTF8&qid=1404363764&sr=8-1&keywords=EVGA+600b

 

[SniffySnoo]

This will be perfect, It has 49A on the 12V rail http://www.amazon.com/EVGA-80PLUS-Bronze-Certified-100-B1-0600-KR/dp/B00EON40CS/ref=sr_1_1?ie=UTF8&qid=1404363764&sr=8-1&keywords=EVGA+600b

Is this non-modular?

 

[jaraldo]

It's non-modular.

What's your budget?

 

[jaraldo]

Either way, it looks like you are going to be overclocking. So I would not recommend the EVGA 500B/600B or the Corsair CX series.
http://www.tomshardware.com/answers/id-1804779/power-supply-unit-tier-list.html

This is the best cheap one I can find for overclocking. XFX 550w $55
http://www.superbiiz.com/detail.php?name=XFX-550S&c=CJ

This one is 750w gold rated and 7 year warranty on sale for $70 after rebate. If you can afford it, I would try to get it.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182073