Originally Posted by Shub
The whole efficiency thing is blown completely out of proportion and highly misunderstood.
Firstly, a difference of 1-2% in efficiency between 50% and 80% load amounts to nothing on your power bill at the end of the month.
But if you're concerned about efficiency, here's a question for you -- if you're at 40% of your PSU's maximum rated load when your computer is under load, then what's the load percentage when your computer is "idle", i.e. when you're just using regular Windows, browsing the web, and all that? Probably <20%. Efficiency typically plummets under 20% loads, often dipping under 80%.
That's why it's best to get a PSU in line with your component's needs, so that you're in the efficiency sweet spot when idle.
Sure, I don't run my rig maxed out the whole time it's on but it sure doesn't sit idle either and as long as your going to buy a psu and spend "X" amount of dollars, why not get the most efficient psu you can afford for that amount?
Now I don't game for hours at a time but some OCN'ers do and that spells LOAD. Buying a larger psu than you need is not a bad idea and it certainly doesn't hurt efficiency as was stated in a previous post, which was my point.
The OP can decide for himself but when you set a certain budget, buy the biggest and best psu that you can afford. That way you can have a safe overhead for future upgrades.
Also the quality power supplies not only meet, but exceed the 80+ gold ratings so that 1-2% could be the minimum. It's possible to realize larger gains.Edited by hollywood406 - 5/20/11 at 5:24am