PSU - Power consumption

[PC User]

Question:

A PSU rated at say 520 W v/s one rated at 400 W. Both used to power the same configutaion.

Does it mean, the power consumption will be more from the higher rated PSU?

(sorry I've got the tree-hugging bug)

[staffsMike]

All boils down to their efficency (80+ etc..) and whether they have an active PFC I believe. This means that they only use the power that they require, they simply have 520 or 400w available to them when required.

[PC User]

I am looking at the Corair HX range, do they have PFC?

will power a build around

Q6600
8800GT
4GB RAM
Artic Pro Cooling
SAmsung DVD Drive
Samsung HDD
Akasa Card Reader
Asus P5K E WiFi Mobo

[staffsMike]

Certain does Great PSU and perfect for the job.