It is with me in an i5 4690K + R9 280X + 2 HDD + 1 SSD + 1 ODD system in it and works perfectly without tension problems, etc. It is very-very quiet and thanks to the modular wiring harness are towards any unused cable in the PC and ago.
If you do not 'play' with Tuning want no more power is needed. (My computer needs eg ~ 400 W.)
But best to read to always know what your own computer needs, there are numerous online calculators on the web. eg: [...]
I'd definitely like to buy part of it! :)