FAQ: Specifications Mainboard "ECS B550A4-EM 2X00".

[#1]

FAQs about the mainboard ECS B550A4-EM 2X00

MSN 20066891

• Which processors (CPUs) can be used?

• Processors from the Ryzen 2000 Series can be installed.

• What is the maximum amount of working memory (RAM) that can be installed?

• There are 2 memory slots on the mainboard each with 16 GB RAM. The maximum capacity is therefore 32 GB.

  Module:	288-Pin DIMM
  Type:	SDRAM-DDR4
  Speed:	2666 MHz
  Voltage:	1.2 V
  Feature:	no ECC Support

  ⚠️Note⚠️ In the 32-bit editions of Windows operating systems a maximum of about 3.2 GB memory is detected.You can find more information about this on the Microsoft website.

• Which M.2 cards can be used?

• Slot	Interface	Dimensions	Key(s)	Hints
  1	PCIe oder SATA	2260, 2280	B key & M key
  2		2230	E key	WLAN only

  
  ⚠️Note⚠️ For the fastening you need a screw with a metric M2 thread and a length between 2.5 mm and 3.0 mm. The head should have a diameter of 4 mm to a maximum of 5 mm. If the screws are not available in your local specialist shop, you can find them in online shops.

• What is the front pin assignment for the mainboard?

• The front pin assignment can be seen in the figure.

  

• Is a BIOS (UEFI) update available for the mainboard?

• An update to version 1.05 is available via Windows Update. The update can be installed via the device manager as follows:

  Press the key combination Windows + x. A menu opens from which you can open the device manager by pressing the g key. Click on the symbol in front of Firmware and then right-click on System Firmware. In the context menu, continue with the entry Update driver. Then simply follow the on-screen instructions.

  

  After the update, you can recognise the successful implementation by the changed name in the device manager. Instead of system firmware, you will now find the name of the mainboard with the current BIOS version number (which may differ from the one in the screenshot) under Firmware.
  
  

  ⚠️Note⚠️ Among other things, the update improves the control of the lights.

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Review Date: 2025-07-20