Look for where you plug in your monitor after opening the case. You'll see 1 of 2 things. 1. Either a large card plugged into a slot perpendicular to the motherboard 2. A cable running from the port you plug the monitor in that connects directly to the motherboard (if this is the case you have what is called an "integrated graphics processor")
slots.
ports
PCI
To be specific, I don't mean the power adapter , but the part it connects to. The part you plug the charger into. I need to know the name of it so i can replace it.
Riser
yes
The thing that gets electricity into a computer is the plug socket, which travels through a kettle lead (a kettle lead connects transfers electricity from the plug socket to the computer) and then into the PSU (power supply unit), which powers the motherboard, which allows the computer to work.
plug it in
Yes, it's called a Power Inverter
RAM
if the motherboard is designed for the case fan you are using its best to plug it into the motherboard, this will free up a spot on the power supply. Otherwise as long as the voltage and amps are the same it doesn't really matter. If you try to plug it into both you will double the power of the fan and very likely fry the fan.