NorthQ NQ-4001EX Super Silent PSU
 

NorthQ has done a great job with their NQ-4001EX power supply. For the price of just USD$50, you’re not only getting a good power supply but a silent solution with the package. It also comes with dual SATA connectors which should serve you well if you have 1 or 2 SATA drives in your rig. However, I hope that NorthQ will improve on the +12v rail as it tend to drop a little especially during high loads. If you’re still looking for a reliable and cheap 20-pin power supply, the NQ-4001EX might just fit the bill.

Link: http://www.pcmoddingmy.com/content.php?review.225