Getting to know your power supply
There are four main connectors, aside from the main power line to the motherboard. They are...
Four pin Molex
Serial ATA
Berg (floppy)
PCI Express
Basically, you need to ensure that
every peripheral device has a connection to the power supply, including fans. I circled exactly where the power connection is to every main peripheral I have.
DVD-RW
Floppy
Hard drive
Take a minute to hide your cables, and then proceed to installing your PCI, AGP, and PCI Express devices.