Socket AM4

Socket AM4
Type ZIF PGA
Contacts 1331
Processors Ryzen:
Athlon
Predecessor AM3+, FM2+
Memory support DDR4
This article is part of the CPU socket series

Socket AM4, also known as PGA 1331, is a microprocessor socket used by AMD's central processing units (CPUs) built on the Zen, Zen+, and Excavator microarchitectures.[1][2] AM4 was launched on September 5, 2016, with the release of Bristol Ridge APUs.

Socket AM4 has 1331 pin slots and is the first from AMD to support DDR4-compatible 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]

Features

  • Support for Zen (and Zen+) based family of CPUs and APUs (Ryzen, Athlon), and also for A-Series APUs and Athlon X4 CPUs (Bristol Ridge & Stoney Ridge based on the Excavator microarchitecture)
  • Supports PCIe 3.0, up to 24 lanes[5]
  • Supports up to 4 modules of DDR4 SDRAM[5] in dual-channel configuration

Cooler support

The AM4 socket has different dimensions than previous AMD sockets, making some previous generation coolers incompatible.[6][7] However, some cooler manufacturers are reported to be offering brackets allowing previously manufactured coolers to work with AM4,[8] while other coolers will be redesigned.[9][10] Alternatively, some motherboard makers are including both AM3 and AM4 cooler mounting holes, allowing previous generation coolers to be used.[11] The AM4 socket has 54×90mm dimensions (distance of the screws) while previous sockets have 48×96mm.

Chipsets

The AM4 socket is a base for 7 chipsets. While the processors for this socket have been designed as systems on a chip (SoC), with the traditional northbridge and southbridge on board the processor, the motherboard chipset will increase the number of PCI Express lanes and other connectivity options. These connectivity options include: NVMe, SATA Express, and USB 3.1 Gen 2. The chipsets and the differences between them are listed in the table below.[2][10][12]

ModelPCI Express (PCIe)SATA + SATA ExpressUSB:
3.1 Gen 2 + 3.1 Gen 1 + 2.0		RAIDAMD StoreMIOverclockingTDP (W)Chipset LithographyAdditional Information
CPU/APU PCIe Link to ChipsetChipset PCIe 2.0 LanesCrossFireSLI
X470[13] ×4 Gen 3.0 ×8 Yes Yes 6 + 2 2 + 10 + 6 0,1,10 Yes Yes 4.8 55 nm[14] "Enthusiast"
X370[15][16][17][18] No 6.8
B450[13][19][20] ×6 No 4 + 1 2 + 6 + 6 Yes 4.8 "Performance"
B350[1][2][21][17][18] No[22] No 6.8
A320[1][2][17][18] ×4 1 + 6 + 6 No 6.8 "Mainstream"
X300[23][1][2][17][18] Yes [22] 2 + 0 0 + 4 + 0 0,1 Yes Unknown "Small form factor"
A/B300 [23][1][2][17][18] No No Unknown

The Chipsets are designed in collaboration with ASMedia.[14] Network interface controller, WiFi, and Bluetooth are provided by external chips connecting to the chipset through PCIe or USB.[24]

See also

References

  1. 1 2 3 4 5 Tyson, Mark (5 September 2016). "7th Generation AMD A-Series desktop PC systems start to ship". Hexus. Retrieved 5 September 2016.
  2. 1 2 3 4 5 6 Mah Ung, Gordon (5 September 2016). "AMD's new Bristol Ridge processor is faster and more power efficient". PC World. Retrieved 5 September 2016.
  3. ↑ "AMD's 2016-2017 x86 Roadmap: Zen Is In, Skybridge Is Out". Anandtech.com. Retrieved 2015-06-19.
  4. ↑ MujtabaHassan, Hassan (2015-05-07). "AMD Confirms x86 Zen Based Enthusiast FX CPUs and 7th Generation APUs in 2016 - Compatible With AM4 Socket". WCCFtech. Retrieved 2016-09-16.
  5. 1 2 Moammer, Khalid. "AMD Zen CPU & AM4 Socket Pictured – PGA Design With 1331 Pins Confirmed". WCCFtech. Retrieved 2016-09-16.
  6. ↑ Peak, Sebastian (19 September 2016). "AMD's Upcoming Socket AM4 Pictured with 1331 Pins". PC Perspective. Retrieved 21 September 2016.
  7. ↑ http://www.pcper.com/news/Cases-and-Cooling/Report-AMD-Socket-AM4-Compatible-Existing-AM2AM3-Coolers
  8. ↑ Killian, Zak (25 January 2017). "CPU heatsink makers ready up Socket AM4 mounting kits". Tech Report. Retrieved 25 January 2017.
  9. ↑ Chacos, Brad (4 January 2016). "AMD reveals an army of Ryzen PCs and AM4 motherboards". PC World. Retrieved 10 January 2017.
  10. 1 2 Walrath, Josh (7 January 2016). "AMD Details AM4 Chipsets and Upcoming Motherboards". PC Perspective. Retrieved 10 January 2017.
  11. ↑ Cutress, Ian (2 March 2017). "The AMD Zen and Ryzen 7 Review". Anandtech. Retrieved 2 March 2017.
  12. ↑ Cutress, Ian (13 December 2016). "AMD Gives More Zen Details". Anandtech. Retrieved 13 December 2016.
  13. 1 2 "AMD Socket AM4 Platform". AMD.com. AMD. Retrieved 13 October 2018.
  14. 1 2 Cutress, Ian (2 March 2017). "Making AMD Tick: A Very Zen Interview it Dr. Lisa Su, CEO". Anandtech.com. Retrieved 2 March 2017.
  15. ↑ Garreffa, Anthony (11 September 2016). "AMD's high-end X370 chipset teased, arrives in Feb 2017". TweakTown. Retrieved 11 September 2016.
  16. ↑ Moammer, Khalid (11 September 2016). "AMD Zen CPUs & High-End "X370" AM4 Motherboards Coming February 2017 To Slug It Out With Intel's Kaby Lake". WCCFTech. Retrieved 11 September 2016.
  17. 1 2 3 4 5 "AMD AM4 Platform Feature Summary". staticworld.net. staticworld.net. Retrieved 6 January 2017.
  18. 1 2 3 4 5 Justin, Michael; Sexton, Allen (3 March 2017). "AMD's AM4 Ryzen Chipsets". Tom's Hardware. Retrieved 3 March 2017.
  19. ↑ "ASUS X470/B450 Series". asus.com. ASUS. Retrieved 18 July 2018.
  20. ↑ ""B450 AORUS M (rev 1.0)". gigabyte.com. ASUS. Retrieved 18 July 2018.
  21. ↑ Burke, Steve (5 September 2016). "AMD AM4 Chipset Specs: B350, A320, XBA300 & A12-9800 APU, X4 950". Gamer Nexus. Retrieved 6 September 2016.
  22. 1 2 Chacos, Brad (17 July 2017). "AMD Ryzen motherboards explained: The crucial differences in every AM4 chipset". PC World. Retrieved 20 November 2017.
  23. 1 2 Mujtaba, Hassan (22 February 2017). "AMD Ryzen Officially Launched". Wccftech. Retrieved 23 February 2017.
  24. ↑ Leather, Anthony (17 March 2017). "Asus Crosshair VI Hero Review". Bit tech. Retrieved 30 March 2017.
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