How to Find a Computer Model Number

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In order to purchase additional memory, hardware-specific accessories and replacement parts for your computer, you need to know your computer's model number. The model number is a unique alphanumeric, sometimes numeric, code used to identify the particular version/series of your computer. As new computers are developed, certain older models are discontinued, and by knowing your computer's model number you can contact the manufacturer to see if it has been discontinued or if parts are still available for your system.

Step 1

Turn your desktop computer around so the back of the device is facing you.

Step 2

Use a flashlight to shine on the back of your desktop computer's case.

Step 3

Look for a sticker containing the wording "Model Number" or "Part Number." The number or alphanumeric string of characters next to the wording is your computer's model number. You may also see "Serial Number" or "S/N," which is your computer's serial number.

Step 4

Write down your desktop computer's model number on a piece of paper.

Step 5

Lay your laptop computer upside down on a flat surface--a desk, countertop or workbench--if you don't see a sticker on the back of your computer.

Step 6

Look for a sticker on the desktop's underside containing the wording "Model Number" or "Part Number." The number or alphanumeric string of characters next to the wording is your computer's model number.

Step 7

Write down your desktop computer's model number on a piece of paper.

Step 8

Look on the front of your desktop or laptop computer for a numeric or alphanumeric code, if you don't see a sticker on the back or bottom of your computer.

Step 9

Write down your desktop computer's model number on a piece of paper.

Things You'll Need

  • Flashlight or flat surface

  • Pen

  • Paper

Tip

If you still can't locate your computer's model number and you are using a Windows-based system, click “Start,” “Run.” In the box next to "Open:" type "dxdiag." Click “OK.” You will be prompted with a dialog box asking if it is OK to access the Internet; click “Yes.” After a few seconds, the "DirectX Diagnostic Tool" dialog box will appear on your screen with information about your computer. Look for the wording “System Model:"; that is your computer's model number.

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