What PSU do I need as calculators are varying wildly - please help :)

[jcsammut]

Hi,

I am looking to build my first PC, but when it comes to the PSU I am getting wildly varying advice from different sources.

The spec I am looking to build is as follows:-

• 
  I7 4770k
  Asus Gryphon Z87
  GTX780
  8gb DDR3 1600
  3TB 7200 rpm HD
  Bluray writer
  3 x case fans
  Zalman CNPS8900 Quiet Ultra Quiet Slim CPU Cooler
  2 or 3 USB devices (e.g. BT, wireless keyboard dongle etc)

I may overclock to around 4GHz, so probably best to factor that in too.

I am restricted to a PSU that measures no more than 150mm x 86mm x 140mm and I would prefer a modular design if possible.

Asus PSU calculator recommends 700
eXtreme PSU calculator recommends around 500

I am not planning on going SLI at this point, so realise if I wanted to I would need to upgrade the PSU later, but just based on the above what should I go for?

Would a 650w PSU be suitable or would it be overkill?

This is my first post, so apologies if I have posted in the wrong section and for the long post!

If I need to provide any more information please let me know.

Thanks in advance!


Jason.

 

[babachicken]

a 650w wouldnt be overkill, but it is a good choice, as it isnt too much, but not too little.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817207014

get this PSU, great performance for the price.

 

[mr91]

This Should be enough http://www.corsair.com/en-us/rm-series-rm550-80-plus-gold-certified-power-supply

The Corsair RM series is quite good below is a video review of the 450 watt version of the rm powering a system similar to what you want to build.

https://www.youtube.com/watch?v=ajiN9aVOv4A

 

[jcsammut]

Thanks so much for the speedy answers!

Both of those are slightly too big (dimension-wise) but it is good to know I do not need a 750w PSU.

I will probably go for a 650w as then I have a little room to grow.

Thanks again - much appreciated!

Regards,


Jason.