what does it mean if your computer uses 1200 watt

[FlameBossGaming]

i am thinking about buying one PC it have a 1200 max power supply what dose this mean for the usage of my electricity.What is the difference between 80-silver and 1200- gold look up this link to see what I mean http://www.custompc.ie/intel-core-i7-4790-extreme-desktop-pc-103308-p.asp
Have a look at the power supply and please tell me witch on is the best for saving electricity.Thanks

 

[Phillip Corcoran]

You misunderstand what the output wattage of a PSU means with regard to your domestic electricity usage.

Let's assume that a particular PC system needs a 600w PSU (the average required for most gaming computers).

If you remove that 600w PSU & replace it with a 1200w PSU, electricity usage will be exactly the same because all the computer components are the same - hence their total wattage requirement will be the same.

Just because a PC has a 1200w PSU, it doesn't necessarily mean that PC is actually consuming 1200w.
All it means is that the PSU is capable of delivering 1200w if a PC system requires it.