The fan and optical drive seem almost within reach—and yet they're screwed in from the bottom, where a large heat pipe assembly keeps guard. However, we're not scared.

We manage to extract the heat pipe gear without serious injury, clearing our way to that spinny thing that blows air.

This Nidec fan is rated for 2.1 amps at 12 volts, or 25.2 watts. So that's where all that extra PSU power is going...