Am4 Pin Layout ((full)) May 2026

Pin Grid Array (PGA)

The AM4 socket, also known as Socket 1331, was AMD’s primary desktop platform from 2017 to 2022, supporting everything from the first Ryzen chips to the powerful 5000 series. It uses a design, where the pins are located on the bottom of the CPU itself rather than in the motherboard socket. Physical Layout and Orientation

mounting pressure.

The AM4 pin layout dictates something critical: The substrate (the green fiberglass the pins attach to) is thinner than an LGA CPU. am4 pin layout

3. Visual Layout of AM4 Pins (Grid Overview)

• Cause: Bending a pin back and forth until it fatigues and snaps.
• Layout impact:

  The left and bottom edges contain the "slow" I/O. Pin Grid Array (PGA) The AM4 socket, also

  pin-to-pin coordinate map

  If you need a literal (e.g., "what is at position D15?"), please specify the exact pin coordinate, and I can provide its known function based on community-sourced data. Cause: Bending a pin back and forth until

  Display Outputs:

  Specific pins for integrated graphics (APUs) like HDMI and DisplayPort.

  underside

  Looking at the CPU with keying corner (triangle) at bottom-left :

  Pin-Free Zones:

  If you look at the bottom of an AM4 chip, you will notice a 2x2 grid of "missing" pins in the top-left corner (relative to the triangle) and 3-pin gaps in others. This ensures the CPU only drops into the socket when oriented correctly.