Choosing a power supply

- Look, I hate to admit it, but I'm a cheapskate.…But there are certain areas where I do not scrimp.…Number one, peanut butter.…I like good peanut butter and everybody knows…that Creamy JIF is the greatest peanut butter known to man.…Secondly, I don't scrimp on power supplies.…When you take a look at a couple of power supplies,…there's a reason why one power supply costs around $39,…and another one can cost almost $200.…The reasons for that has a lot…more to do than simply wattage.…Granted, this one has a lot more wattage than this one,…but this one comes with a lot of other stuff that you need…to be aware of when you're buying your own power supply.…

The first big one is efficiency.…Power supplies do not take the voltage…and the amps and turn it perfectly into watts.…There's, because of heat and the mechanism…of the switching power supply, there's always some waste.…Efficiency is measured as a percentage, so a really good…power supply, hint hint, is going to have efficiencies…north of 90%, where a not so good power supply, hint hint,…