Socket AM5: Everything You Need To Know

AMD has used LGA-style sockets for its HPC platform, but not for desktops. However, as Intel has also been doing for some time, it will now use socket AM5 for its new Zen 4 chips onwards. This new connection also brings new chipsets to form a new platform. Here you can learn all its secrets.

Socket AM5

Socket AM5
Socket AM5

The AMD Zen 4 microarchitecture brings some very interesting news, such as the arrival of PCIe 5.0 lanes, DDR5 memory, as well as greater processing performance, and news also at the physical level and in terms of the electronic interface with the motherboard, which will change to a new socket called AM5 which will have more connections for the new CPU.

Ryzen 7000 Series
Ryzen 7000 Series
  • Successor to socket AM4
  • Intended for the Ryzen 7000 Series (Zen 4) / Codename “Raphael” and future generations
  • Socket type LGA (Land Grid Array) and ZIF (Zero Insertion Force)
  • 1718 contact pads
  • Flip chip packaging
  • Infinity Fabric Interconnect Protocol
  • Support for DDR5 memory
  • Support for PCI Express 5th Gen
  • USB next generation (USB4)

Socket/CPU connectivity

AMD’s new Zen 4 chips will have 28 PCIe 5.0 lanes out of the CPU. The first 16 lanes will be used for a single PCIe x16 slot for the GPU or split into two PCIe x8 slots as desired by the motherboard manufacturer.

On the other hand, there are another 8 general purpose lanes, 4 of them should be dedicated to storage slots for M.2 NVMe PCIe Gen 5 and another 4 can be used more freely at the convenience of the motherboard manufacturer, such as for USB4 ports, Thunderbolt 4, for more additional M.2 slots, etc.

It is also important to note that the iGPU of the Ryzen 7000 Series will allow support for four dedicated outputs for displays, with support for both HDMI 2.1 and DisplayPort 2.0, although they are not mandatory in any case and the motherboard manufacturer is free to choose.

The first Zen 4 platform will also be equipped with 4 USB 3.2 Gen 2 ports at 10 Gbps speed, and at least 1x USB 2.0 coming from the CPU. The others will have to be added with external USB drivers. It is also known that 3 of those USB 3.2 Gen 2 ports will be supported as DP Alt mode.

Finally, the other four remaining PCIe lanes will be used to connect the CPU to the chipset.

Chipset connectivity

AMD Zen 4 and Socket AM5
AMD Zen 4 and Socket AM5

In addition to the aforementioned direct connections to the CPU, the next-generation AMD platform will also have others with other connections through the chipset. In this chip, you will have 16 PCIe lanes in total. The way of distributing them is different.

4 PCIe 4.0 lanes will be connected to the CPU to be used as an interface between the chipset and the CPU. For a secondary chipset, another 4 lanes are used as a direct link, leaving only 8 usable PCIe lanes. On the other hand, the secondary chipset features up to 12 usable PCIe 4.0 lanes for the X670 and X670E. 4 of them are PCIe 3.0 for SATA III 6 Gbps interfaces. In the case of the B650, there are only 8 PCIe 4.0 lanes.

Finally, it should also be detailed that each chipset will have 6 USB 3.2 Gen 2 interfaces at 10 Gpbs. The first two can be combined to offer 20Gbps USB 3.2 Gen 2×2, which would mean motherboards can have up to 16 10Gbps USB 3.2 Gen 2 ports or 2x 20Gbps USB 3.2 Gen 2×2 ports. and 12 USB 3.2 Gen 2 ports at 10 Gbps. And not to forget about the support for 6 USB 2.0 ports from the chipset.


The new motherboards with socket AM5 and prepared for AMD Ryzen 7000 Series (Zen 4) chipsets
The new motherboards with socket AM5 and prepared for AMD Ryzen 7000 Series (Zen 4) chipsets

As can be guessed from the above, the new motherboards with socket AM5 and prepared for AMD Ryzen 7000 Series (Zen 4) chipsets will have a series of chipsets:

  • X670E
  • X670
  • B650E
  • B650

Four models range from the highest to the lowest range, from the X670E with the highest performance and interfaces to the simplest B650.

Socket AM5 up to 2025 and without DDR4 support

Socket AM5 up to 2025 and without DDR4 support
Socket AM5 up to 2025 and without DDR4 support

One change to socket AM5 that has been disliked is the support for DDR5 and the removal of support for DDR4. Since DDR4 memory is still competitive and the performance differences are not too significant with DDR5. However, the price of DDR5 is higher.

AMD’s reason for removing DDR5 support from its AM5 motherboards is logical. And is that they have wanted to bet on a platform for the future, without inheriting outdated technologies, allowing CPUs to be updated for at least 3 years.

However, AMD has tried to make users happy with another announcement, and that is that they will continue to support this AM5 socket until 2025. That is to say, while the AM4 has also been with us for several generations, now it is intended to do the same with the AM5, which will be around for at least three years. This means that it will be compatible with new generations and could be updated more easily without changing the motherboard.

Read more about AMD Ryzen 7 7800X And Ryzen 3 7300X With 10 And 4 Zen 4 cores

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Abram left his e-business studies to devote himself to his entrepreneurial projects. In 2017, he created the company Inbound Media and wrote articles about high-tech products for his Chromebookeur site. In 2019, Chromebookeur was renamed Macbound and became a general purchasing advice site. Today, Abram manages the development and growth of Macbound, surrounded by a young and talented team.

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