AMD Socket AM4

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Socket AM4
TypePin grid array (μOPGA)
Contacts1331
ProcessorsRyzen:
  • Summit Ridge
  • Raven Ridge
  • Pinnacle Ridge
  • Picasso
  • Matisse

Athlon:

  • Raven Ridge

A-Series, Athlon X4:

  • Bristol Ridge
PredecessorAM3+, FM2+, AM1
Memory supportDDR4 SDRAM

AM4 is a AMD motherboard socket for Ryzen processors (Zen, Zen+, Zen 2 and Zen 3) launched in 2016. It has 1331 pins. AM4 platforms use DDR4 memory. AM4 motherboards are typically only compatible with a limited number of processors designed for the AM4 socket out of the box, namely those common at the time the motherboard was launched. Additional processor compatibility can usually be unlocked by updating the BIOS. Older AM4 boards have one x16 PCIe 3.0 slot (capable of being split into two x8 slots) and PCIe 2.0 for the rest of the PCIe slots. Newer 5xx series boards have one PCIe 4.0 x16 slot and PCIe 3.0 connectivity to the rest of the PCI express slots.

AMD will likely replace AM4 with something else to allow features like DDR5 memory support in 2021.

Amd-mousepad-autumn-002.jpg
AMD AM4 motherboards are made for "Ryzen" processors.

Chipsets

Chipset Release Date PCI Express (PCIe) USB:
3.2 Gen 2 + 3.2 Gen 1 + 2.0
Storage features Overclocking TDP CPU support
PCIe lanes[x 1] AMD CrossFireX SLI SATA ports BIOS RAID StoreM Zen 1 Zen+ Zen 2 Zen 3
A320 February 2017 PCIe 2.0 ×4 Dialog-cancel.svg Dialog-cancel.svg 1 + 2 + 6 4 0, 1, 10 Dialog-cancel.svg Dialog-cancel.svg ~5 W Dialog-ok.svg Dialog-ok.svg Varies[x 2] Dialog-cancel.svg
B350 February 2017 PCIe 2.0 ×6 Dialog-ok.svg 2 + 2 + 6 Dialog-ok.svg
X370 February 2017 PCIe 2.0 ×8 Dialog-ok.svg 2 + 6 + 6 8
B450 March 2018 PCIe 2.0 ×6 Dialog-cancel.svg 2 + 2 + 6 4 Dialog-ok.svg Dialog-ok.svg Yes + Template:Abbr Dialog-ok.svg Varies[x 3]
X470 March 2018 PCIe 2.0 ×8 Dialog-ok.svg 2 + 6 + 6 8
A520 August 2020 PCIe 3.0 ×6 Dialog-cancel.svg Dialog-cancel.svg 1 + 2 + 6 4 Dialog-cancel.svg Dialog-cancel.svg Dialog-cancel.svg Dialog-ok.svg
B550 June 2020 PCIe 3.0 ×6 Dialog-ok.svg Dialog-ok.svg 2 + 2 + 6 6 Dialog-ok.svg Yes + Template:Abbr
X570 July 2019 PCIe 4.0 ×16 8 + 0 + 4 12 ~15 W Dialog-ok.svg
  1. PCIe lanes provided by the chipset. The CPU provides other PCIe 3.0 or 4.0 lanes.
  2. BIOS update needed. Availability may depend on manufacturer.
  3. Beta BIOS updates will be made available by motherboard manufacturers.

See also

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