[header] How to install a computer processor [title] Determine which cpu is in your computer either by reading the start-up screen or using diagnostic software. [step] You may also determine your cpu type and speed by removing the system unit cover and taking a good long look at the chip. Look at the label on the chip to determine its model, speed, and the manufacturer. 
[substeps] Note: if a heat sink or a fan is installed on top of the chip, you will have to remove these components to view the cpu label. [title] Turn off and unplug the system unit.