You have to consider the power rating of the motherboard, processor and add-on devices such as video and sound cards. The video and sound cards, for example, take some of the load off of the processor but they consume more power than your typical on-board audio and video chipsets. The best way to go is to at least match the power rating of the old power supply, but you can usually go higher without much added cost. It's best to go higher if the customer had added components or is considering upgrading his motherboard, processor, et cetera but keeping the same case and power supply. Too small a power supply will cause problems such as poor performance and overheating; you won't run into a problem with "too much power" available from the power supply because the computer will only draw what's needed from it.
Possibly not enough output power. Are you sure that you got the right size power supply?
power supply
No, tower cases do not always come with a power supply. Sometimes they come with a standard one, but many people prefer to choose their own.
It is to allow your computer to run without having to keep it charging right next to a socket all dayThe main purpose of a power supply is to distribute the right amount of power to all the components of a computer.
CPUs get power from two places-- From the motherboard through the tiny pins on the bottom of the CPU (Which in turn gets power from the 20 / 24 pin connector that connects tot he power supply) and from a 4 / 8 (Only on the newest boards) - pin connector that directly feeds the CPU a very steady supply of power. Both come from your actual Power Supply.
Don't, it won't work right
No. Many power supplies have different mounting screws, vent locations, and even sizes.
Alternator fails to supply power.
a automatic launcher you can choose to spin left or right and choose how much power you want to use
UPS = Uninterruptible Power Supply
power supply is a device that supplies electric power to electrical load
all about regulated power supply