Am4 Pinout Diagram !!exclusive!! -

1. Overview of AM4 Socket

• Package type: LGA (Land Grid Array) – pins on motherboard, pads on CPU.
  (Contrary to common misconception: AM4 is actually µOPGA? Let's correct that:
  Actually, AM4 uses PGA for CPUs – pins on the CPU, holes in socket. Many confuse it because TR4/sWRX8 are LGA. But AM4 is PGA (1331 pins). Yes, AM4 is Pin Grid Array: CPU has pins, socket has holes. Confirmed via AMD documentation.)
• Pin count: 1331 (some sources say 1330 – one key pin missing for keying).
• First introduced: 2016 (Bristol Ridge APUs), mainline: 2017 (Ryzen 1000).
• Supported CPUs: Ryzen 1000–5000 series, Athlon, A-series APUs.
• Key electrical specs:

  Example pin groups (conceptual — NOT an exhaustive per-pin mapping)

  A typical AM4 pinout categorizes pins into several critical functional blocks: Level1Techs Forums Power and Ground (VSS/VCC) am4 pinout diagram

  • VDD (Voltage Drain): These pins deliver the core voltage (Vcore) to the CPU. Because modern Ryzen CPUs draw high current, these pins are distributed across the socket to prevent hotspots and ensure even current distribution.
  • VSS (Ground): Interspersed between voltage pins, ground pins complete the electrical circuit and provide shielding against electromagnetic interference (EMI).

  The Future: AM5 and Beyond

  With AM5 (LGA 1718) now mainstream, the AM4 pinout diagram remains relevant because millions of Ryzen 1000-5000 systems are still in daily use. Moreover, repair shops continue to fix AM4 motherboards, and retro-PC builders are scooping up cheap X370 boards. The principles you learn from AM4—power plane distribution, ground stitching, high-speed signal pinout—apply directly to newer sockets. Package type : LGA (Land Grid Array) –