Corsair CX400W is an excellent product for the regular user that is building a PC with just one video card. It provides enough cables and they are long, allowing you to easily install this power supply inside a full tower case.

Efficiency was great for an entry-level product, peaking almost 84%. Voltages were very close to their nominal values and ripple and noise were practically non-existent.

Internally Corsair CX400W is similar to Corsair VX450W, Antec EarthWatts 500 W and Arctic Cooling Fusion 550RF, but using less power transistors on the primary.

Costing only USD 50, it provides an outstanding cost/benefit ratio. If you are building a mainstream PC and are not thinking of installing a very high-end video card you can buy this power supply with your eyes closed.