processor i5 - 3570/ 3.4 GHz
motherboard ASUS P8B75-V
ram corsair vengeance 2x4gb 1600mhz
gpu Gigabyte NVIDIA GeForce GTX 660 2 GB GDDR5 GV-N660OC
the psu i have chosen is Seasonic S12II 520 is this a good selction
The seasonic S12II series are the old war horse of quality power supplies. Old design done about as well as it could possibly be done. Stable voltages, ridiculously low ripple, quiet, 5 year warranty, all japanese capacitors. It's hard to do better at the same price and really easy to do worse. Pull the trigger.