Socket AM4

Socket AM4

Release date	September 2016 (2016-09)
Designed by	AMD
Manufactured by	Lotes
Type	μOPGA-ZIF
Chip form factors	Flip-chip
Contacts	1331
FSB protocol	Infinity Fabric, PCI Express
Voltage range	1.3V
Processor dimensions	40mm × 40mm 1,600mm2
Processors	Ryzen: Summit Ridge Pinnacle Ridge Raven Ridge Matisse Picasso Renoir Vermeer Cezanne Athlon: Raven Ridge Picasso A-Series, Athlon X4: Bristol Ridge
Predecessor	AM3+, FM2+, AM1
Successor	AM5
Memory support	DDR4
This article is part of the CPU socket series

Socket AM4 is a PGA microprocessor socket used by AMD's central processing units (CPUs) built on the Zen (including Zen+, Zen 2 and Zen 3) and Excavator microarchitectures.^[1][2]

AM4 was launched in September 2016 and was designed to replace the sockets AM3+, FM2+ and FS1b as a single platform. It has 1331 pin slots and is the first from AMD to support DDR4 memory as well as achieve unified compatibility between high-end CPUs (previously using Socket AM3+) and AMD's lower-end APUs (on various other sockets).^[3][4] In 2017, AMD made a commitment to using the AM4 platform with socket 1331 until 2020.^[5][6][7] AM5 succeeded the AM4 platform in late 2022 with the introduction of the Ryzen 7000 series, however, AMD has continued to release new CPUs for AM4 even after the release of AM5.^{[8][9][10][11]}