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Green micro-ATX board with two DDR3 slots, one PCIe x16, one PCIe x4 and one PCIe x1 slot, black I/O shield included

GIGABYTE

GIGABYTE GA-A55M-S2H AMD motherboard Socket FM1 DDR3 64GB Micro ATX

SKU CH-5016-3MCSC

Socket FM1 board with AMD A55 chipset, two DDR3 slots for 64 GB, one PCIe x16 and one x4 slot, six SATA ports, Realtek ALC889 audio and RTL8111E gigabit LAN, ten USB 2.0 ports.

  • CPU Socket TypeSocket AM4
  • CPU TypeAM4 slot: support AMD Ryzen ™ 5000 series/Ryzen ™ 5000 G ser
  • ChipsetAMD A55
  • Maximum Memory Supported64GB
  • PCI Slots1 PCI Express x16 slot, supporting x16 operation specificati
  • SATA RAID6XSATA II interface
  • Socket FM1 supports AMD A-Series APUs for integrated graphics performance
  • AMD A55 chipset provides 6 SATA II ports for storage expansion
  • Dual-channel DDR3 memory up to 64 GB for responsive multitasking
  • Realtek ALC889 audio delivers 7.1 channel high-definition sound
  • Realtek RTL8111E LAN offers 1000 Mbit wired network connectivity

Socket FM1 AMD A55 motherboard

The GIGABYTE GA-A55M-S2H is a Micro ATX board built around the AMD A55 chipset and Socket FM1. It supports up to 64 GB of DDR3 memory across two DIMM slots and provides one PCI Express x16 slot, one x4 slot and one x1 slot. Integrated Realtek ALC889 audio delivers up to 7.1 channels with S/PDIF output, while a Realtek RTL8111E controller supplies 10/100/1000 Mbit LAN. Six SATA II ports and up to ten USB 2.0 ports complete the I/O.

Suits FM1 APU upgrades and basic desktop builds

This board fits users replacing or assembling a system around an FM1 APU who need legacy DDR3 support and a compact Micro ATX form factor. The six SATA II ports and ten USB 2.0 connections cover multiple drives and peripherals. Builders requiring newer CPU sockets or higher memory bandwidth should look at something else.

Maximum 64 GB DDR3 capacity

The two DIMM slots accept DDR3 modules up to a combined 64 GB, which is the single specification that determines whether this board meets the memory needs of the intended system.

Highlights

  • Socket FM1 supports AMD A-Series APUs for integrated graphics performance
  • AMD A55 chipset provides 6 SATA II ports for storage expansion
  • Dual-channel DDR3 memory up to 64 GB for responsive multitasking
  • Realtek ALC889 audio delivers 7.1 channel high-definition sound
  • Realtek RTL8111E LAN offers 1000 Mbit wired network connectivity

Specifications

BrandGIGABYTE
SeriesGIGABYTE GA-A55M-S2H
ModelGIGABYTE AX370-Gaming
CPU Socket TypeSocket AM4
CPU TypeAM4 slot: support AMD Ryzen ™ 5000 series/Ryzen ™ 5000 G series/Ryzen ™ 4000 G series/3rd generation Ryzen ™/2nd generation Ryzen ™/1st generation Ryzen ™/2nd generation Ryzen ™ built-in RadeonVega ™ graphics display/1st generation Ryzen ™ built-in RadeonVega ™ graphics display/Athlon ™ built-in RadeonVega graphics display series processor
ChipsetAMD A55
Maximum Memory Supported64GB
PCI Slots1 PCI Express x16 slot, supporting x16 operation specification (PCIEX16) (Note 5)
1 PCI Express x16 slot, supporting x4 operating specifications (PCIEX4)
3. 1 PCI Express x1 slot
All PCI Express slots support PCI Express 2.0.
4. 1 PCI slot
SATA RAID6XSATA II interface
Audio Chipset1. Built-in Realtek ALC889 chip
2. Support High Definition Audio
3. Support 2/4/5 1/7.1 channels (Note 4)
4. Support S/PDIF output
LAN ChipsetBuilt-in 1 Realtek RTL8111E chip (10/100/1000 Mbit)
Onboard USBBuilt-in chipset:
Up to 10 USB 2.0/1 ports (6 on the rear panel, 4 to be connected from the USB socket in the main board via cable)

Questions about this item

Which processor socket must my CPU match for the GA-A55M-S2H?

The board uses Socket FM1, so only FM1 APUs will fit and function.

Can I keep my DDR3 memory when moving to this board?

Yes, the two DIMM slots accept DDR3 modules up to a total of 64GB.

How do I confirm the onboard audio is active after building?

The Realtek ALC889 codec supports up to 7.1-channel output; verify in the OS sound control panel that all channels appear and play test tones.

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