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Green rectangular Micro ATX motherboard with silver CPU socket, four black DDR3 slots, blue PCIe x16, white PCIe x1 and PCI slots

MSI

MSI A55M-E33 AMD motherboard Socket FM2/FM2+ DDR3 32GB Micro ATX

SKU CH-PXHD-XS4NE

Micro ATX board for FM2/FM2+ CPUs with dual-channel DDR3 up to 2133 MHz and 32 GB capacity

  • CPU Socket TypeSocket FM2/FM2+
  • CPU TypeA-Series/Athlon series processors supporting AMD Socket FM2
  • ChipsetAMD A55
  • Memory StandardSupports dual-channel DDR3 2133 (overclocking)/1866/1600/133
  • Maximum Memory Supported32GB
  • PCI Slots1 x PCIe 3.0 x16 slot * 1 x PCIe 2.0 x1 slot 1 x PCI slot
  • Supports dual-channel DDR3 up to 2133 MHz for responsive multitasking
  • AMD A55 chipset with Socket FM2/FM2+ fits A-Series and Athlon CPUs
  • Realtek RTL8111 G Gigabit LAN delivers 10/100/1000 Mb/s wired connectivity
  • Realtek ALC887 audio chip provides clear onboard sound
  • Four SATA II ports enable multiple storage drives

Socket FM2/FM2+ platform

The MSI A55M-E33 motherboard uses the AMD A55 chipset and fits Socket FM2 and FM2+ A-Series or Athlon processors in a Micro ATX form factor. Dual-channel DDR3 memory runs at 1333, 1600, 1866 or 2133 MHz with a maximum capacity of 32 GB.

Thermals noise and power

The board draws power through standard ATX and CPU connectors while the A55 chipset and Realtek RTL8111 G Gigabit LAN controller operate within typical desktop thermal limits. No active cooling is mounted on the chipset, so system airflow handles heat dissipation during normal workloads.

Bundled accessories change

A CMOS battery, one SATA cable and a chassis I/O back panel are included so the board can be installed and configured immediately. No driver disc or additional software is supplied, and WiFi hardware is not present on this model.

Highlights

  • Supports dual-channel DDR3 up to 2133 MHz for responsive multitasking
  • AMD A55 chipset with Socket FM2/FM2+ fits A-Series and Athlon CPUs
  • Realtek RTL8111 G Gigabit LAN delivers 10/100/1000 Mb/s wired connectivity
  • Realtek ALC887 audio chip provides clear onboard sound
  • Four SATA II ports enable multiple storage drives

Specifications

BrandMSI
SeriesMSI A55M-E33
ModelMSI A55M-E33
CPU Socket TypeSocket FM2/FM2+
CPU TypeA-Series/Athlon series processors supporting AMD Socket FM2 + architecture
ChipsetAMD A55
Memory StandardSupports dual-channel DDR3 2133 (overclocking)/1866/1600/1333MHz memory
Maximum Memory Supported32GB
PCI Slots1 x PCIe 3.0 x16 slot *
1 x PCIe 2.0 x1 slot
1 x PCI slot
SATA RAID4XSATA II interface
Audio ChipsetRealtek ALC887 Audio Chip
LAN ChipsetRealtek RTL8111 G Gigabit LAN Controller
- Supports 10Mb/s, 100Mb/s and 1000Mb/s
Compliant with PCI-Express bus v1.0a specifications
Onboard USB4 USB 2.0 ports (backplane)
4 USB 2.0 ports (front)

Questions about this item

How do I install the board into a micro-ATX case and which standoff step is often missed?

Align the board with the case standoffs, secure it with screws, attach the supplied I/O shield, then connect the 24-pin and 4-pin power cables before adding any expansion cards.

What maintenance or replacement will this motherboard need later?

The included CMOS battery will eventually lose charge and should be swapped when the system clock drifts or BIOS settings reset.

What limit appears first under sustained heavy load on this platform?

The AMD A55 chipset and VRM area can become the thermal bottleneck before the CPU hits its own throttle point.

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