Am4 Pin Layout -

Introduction For PC builders and hardware enthusiasts, the motherboard CPU socket is a sacred space. In the AMD ecosystem, the AM4 socket reigned supreme from 2017 to 2022, supporting five generations of CPU architectures (Zen, Zen+, Zen 2, Zen 3, and some Zen 3+). While AMD has since moved to the AM5 socket (LGA), millions of AM4 systems remain in daily use as the go-to budget and mid-range gaming platform.

As AMD phases out AM4 production in 2025 (retaining only low-end Athlon and Ryzen 4000 series), these 1,331 pins represent the last mainstream PGA consumer socket in history. Whether you are fixing a bent Ryzen 5 3600 or pushing a 5950X on an old B350 board, respecting the pin layout is the difference between a working system and a costly paperweight. am4 pin layout

| Feature | AM4 (PGA) | AM5 (LGA) | Intel LGA 1700 | | :--- | :--- | :--- | :--- | | | 1,331 pins | 1,718 contacts | 1,700 contacts | | Mechanism | Pins on CPU | Pins in socket | Pins in socket | | Die/Pin Density | Lower (1.0mm pitch) | Higher (0.8mm pitch) | Highest (variable) | | Power Delivery | Mixed core/SOC | Dedicated power vs. I/O | Separate Vcore/VCCGT | | PCIe Support | Up to Gen 4 (5 with X570S) | Gen 5 | Gen 5 | | Common Failure | Bent CPU pins | Bent socket pins | Bent socket pins | Introduction For PC builders and hardware enthusiasts, the

When removing the cooler on an AM4 system, always run a stress test for 10 minutes to heat the thermal paste, then twist the cooler before pulling upward. The PGA layout's greatest weakness is adhesion—do not rip the CPU out of the locked socket. Last updated: October 2025. Information compiled from AMD engineering white papers (NDA-broken), motherboard repair schematics, and the enthusiast community at r/AMDHelp. As AMD phases out AM4 production in 2025