What controls the power to the motherboard?

Answer 1

The most overlooked part of a computer is the power supply. (The second is cooling) The power supply takes AC power from your wall and converts it to DC power and supplies electrical current to your motherboard, CPU, and all other devices. When selecting a computer make sure that the power supply is not only rated for your computer in its present state, but can handle future devices such as additional DVD drives or hard drives. Motherboards also have voltage regulators on them.

An under-rated power supply will work harder and produce more heat which will tax the cooling system. Cheap inexpensive power supplies can produce hardware and software problems. Additionally if a power supply fails, it can allow more than desirable amounts of electricity to your components which could result in damage.

Lastly, consider an Uninterruptible Power Supply (UPS). Besides providing battery power in case of electrical failure they "clean" the power before it goes to your computer's power supply by eliminating spikes and sags in power.

Answer 2

The Power Supply Unit (PSU), You will need a 24pin connect,which is should already come with the PSU, just connect that pin to the one that matches on your motherboard. You should also refer to your motherboard manual for instructions on where to connect pins and such.

Answer 3

Cmos ram