Please choose the correct ending to complete the given sentence: Computers and Electronics: [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.

Ending1: [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. Ending2: [substeps] If the chips look processed, there are symbols next to the chip that indicate their model and speed. There may also be an add or remove sticker associated with a cpu and axis. Ending3: [substeps] All chips will have a cpu reading between 64 and 79 volts, sometimes lower than 50 volts. If you haven't done this, check the manufacturers website and about the model for a cpu that's american, or road-grade. Ending4: If it is an intel 212 or newer model, for example, it will be labeled cpu hot air with a " cpu heat source " label from any manufacturer. If it is not, it will be labeled gb.

Answer format: ending1/ending2/ending3/ending4