Hi, Just bought a 450 MHz Cube which I want to upgrade. I ordered 1.5 GB memory and have a larger HD. I also got through eBay a Motorola/Freescale 7447A CPU (1.67 MHz) which I would like to install on the existing Logic Board. Does any of you know whether I need to upgrade the firmware to make this CPU running or do anything else except for replacing the CPU and adding a fan for cooling. I look forward to any of your experiences in upgrading the Cube, including upgrades of the graphics card.