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Green rectangular micro-ATX motherboard with black sockets and silver heatsinks

MSI

MSI 785GM-E51 AMD motherboard Socket AM3 DDR3 16GB Micro ATX

SKU CH-KJ37-FXXXP

Socket AM3 micro-ATX board with AMD 785G chipset, dual-channel DDR3 up to 16 GB, one PCIe 2.0 x16 slot, five SATA ports and Gigabit LAN

  • ProcessorSupports 64-bit AMD Phenom II processors
  • ChipsetAMD 785G
  • CPU socketSocket AM3
  • Supported memorySupport dual-channel DDR3 1600/1333/1066/800 MHz memory
  • Max supported RAM16 GB
  • PCI slots1 PCI Express x16 slot, supports PCIE 2.0 × 16 speed executi
  • Supports 64-bit AMD Phenom II processors for responsive computing
  • Dual-channel DDR3 up to 1600 MHz delivers 16 GB maximum capacity
  • PCI Express 2.0 x16 slot enables modern graphics performance
  • Realtek Gigabit LAN provides 10/100/1000 Mb/s wired connectivity
  • Realtek audio chipset supports 8-channel Blu-ray sound output

Socket AM3 platform

The MSI 785GM-E51 motherboard uses the AMD 785G chipset and a Socket AM3 CPU interface. It accepts 64-bit AMD Phenom II processors and fits a micro-ATX form factor. The board ships with a CMOS battery, one SATA cable and an I/O back panel.

DDR3 memory ceiling

Dual-channel DDR3 runs at 1600, 1333, 1066 or 800 MHz. The memory controller caps total capacity at 16 GB across the available slots. Speeds above 1600 MHz are not supported by this chipset.

Expansion and I/O limits

A single PCI Express 2.0 x16 slot handles graphics, while one PCI Express x1 slot and two 3.3 V or 5 V PCI slots provide legacy expansion. Five SATA II ports manage storage. Six USB 2.0 ports sit on the rear panel. Gigabit LAN tops out at 1000 Mb/s.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $31.99
Cheaper than about 96% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Product lineMSI 785GM-E51
Model nameMSI 785GM-E51
Processor
ProcessorSupports 64-bit AMD Phenom II processors
CPU socketSocket AM3
ChipsetAMD 785G
Memory
Supported memorySupport dual-channel DDR3 1600/1333/1066/800 MHz memory
Max supported RAM16 GB
Storage
SATA and RAID support5XSATA II interface
Audio & video
Audio chipRealtek Advanced Sound Chip
- Support Blu-ray sound output
- Supports 8-channel sound effects detected by intelligent sound interface
Compatible with Azalia 1.0 specifications
Connectivity
Ethernet controllerRealtek PCI-E GbLAN Controller 8111DL Chip
- Integrate Fast Ethernet MAC and PHY into a single chip
- Supports 10Mb/s, 100Mb/s and 1000Mb/s
Compliant with PCI-Express bus specification v1.0a.
Ports & slots
PCI slots1 PCI Express x16 slot, supports PCIE 2.0 × 16 speed execution
1 PCI Express x1 slot
2 PCI slots, supporting 3.3v/5v PCI main bus interface
Onboard USB headers6 USB 2.0 ports (backplane)

Questions about this item

Which DDR3 speed should I pick for this board?

The board supports dual-channel DDR3 at 1600, 1333, 1066 and 800 MHz. Choose the fastest speed your budget allows; all four are compatible.

What does the 16 GB maximum mean when I install modules?

You can install up to 16 GB total across the memory slots. Populate both channels with matched pairs for dual-channel operation.

What does the PCI Express 2.0 x16 slot limit in practice?

The slot runs at PCIe 2.0 x16 speed, capping graphics-card bandwidth to that generation's throughput.

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