These little ATX power supplies could be bought off from Ebay cheaply. Its build quality wasn't that bad. It works fine on my old Intel Core2 system. However, I don't like the fact that it uses a single AWG20 wire to on the 12V-ATX connector. There's no way it could safely powered a 65w or 5 amps CPU.
The board takes 12v input from a 6pin molex connector since the the 12V rail alone can supply up to 12A of current. The capacitor was pretty much an afterthought.
Rear side of the adapter.
I've also added some copper sheet to add more area for the ground plane.
Front side of the adapter
System working as it should with additional improvements.