The Graphics Card

The Cube came standard with a Mac ATI Rage 128 Pro 16MB AGP Card. ATI Radeon (32MB) and nVidia GeForce 2MX (32MB) cards were BTO options.

There are few Cube compatible mac cards, due to the cube's small size, heat dissipation limitations, and limited power supply capabilities.

Remove these T10 screws:

Then, pull the top piece of metal off of the computer,

There is a small fragile cable coming from the top if the cube for the power button/LED, before fully removing the piece, unplug this cable from the logic board.