a 5450 is a model line-up that isn't very demanding of energy from the power supply and it gets the power required from the motherboard . 400 watts should be sufficient for total system needs.
the PC power supply topic gets crazy in the details. the most obvious detail is "peak" output or "continuous" output, the latter being the more desireable, and expensive.
another detail that has emerged in recent years is the 80+ credential. 80+ is a tell-tale sign that the power supply is manufactured with efficiency as a priority.
most of the corsair and antec power supplies are within desireable range of the home users budget and performance demands.
what is fascinating is that the origins of the power supply units are spread out far and wide. abc mfg co. might make power supplies for xyz brand as well as other entities and it is sometimes difficult to ascertain exactly where the power supply originated without focused research effort ..
Edited by synergy513, 06 May 2015 - 01:00 AM.