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ATX motherboard in black with silver heatsinks and blue slots

MSI

MSI 870-G45 AMD 770 AM3 DDR3 16GB ATX motherboard

SKU CH-H1NN-PX2TB

Socket AM3 board with AMD 770 chipset, dual-channel DDR3 up to 16 GB, one PCI Express x16 at 2.0 x 16 and a second at x4, six SATA II ports, Gigabit LAN and six USB 2.0 ports

  • ProcessorSupports 64-bit AMD Phenom II X6/X4/X3/X2, Athlon II X4/X3/X
  • ChipsetAMD 770
  • CPU socketSocket AM3
  • Supported memorySupports dual-channel DDR3 2000 (overclocking)/1800 (overclo
  • Max supported RAM16 GB
  • PCI slots1 PCI Express x16 slot supports PCIE 2.0 × 16 speed executio
  • Supports up to 16 GB DDR3 memory for multitasking headroom
  • Dual-channel DDR3 speeds up to 2000 MHz when overclocked
  • AMD 770 chipset with Socket AM3 for Phenom II and Athlon II CPUs
  • PCIe 2.0 x16 plus x4 and x1 slots for graphics and add-in cards
  • Six SATA II ports with RAID for storage flexibility

Socket AM3 DDR3 Platform

This ATX motherboard uses the AMD 770 chipset and a Socket AM3 interface to support 64-bit Phenom II and Athlon II processors. It provides a dual-channel DDR3 memory controller with a maximum capacity of 16GB. The board targets builders maintaining or upgrading legacy AMD systems.

PCI Express 2.0 x16 Primary Slot

The single specification that decides fit is the primary PCI Express x16 slot running at 2.0 x16 speed. A second x16 slot operates at x4 speed alongside one x1 slot and three 32-bit PCI slots. This layout determines which graphics cards and expansion cards can be installed simultaneously.

16GB Memory Limit and Six SATA Ports

Dual-channel DDR3 supports speeds up to 2000 with overclocking, though the board caps total memory at 16GB. Six SATA 3Gb/s connectors handle multiple hard drives or SSDs. The Atheros AR8131M Gigabit LAN and VIA VT1828S 8-channel audio cover networking and sound without extra cards.

How it compares

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

Price $35.99
Cheaper than about 95% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Product lineMSI 870-G45
Model nameMSI 870-G45
Processor
ProcessorSupports 64-bit AMD Phenom II X6/X4/X3/X2, Athlon II X4/X3/X2 and Sempron processors
CPU socketSocket AM3
ChipsetAMD 770
Memory
Supported memorySupports dual-channel DDR3 2000 (overclocking)/1800 (overclocking)/1600 (overclocking)/1333/1066/800 memory
Max supported RAM16 GB
Storage
SATA and RAID support6XSATA II interface
Audio & video
Audio chipVIA VT1828S chip
- Supports 8-channel sound effects detected by intelligent sound interface
Compatible with Azalia 1.0 specifications
Connectivity
Ethernet controllerAtheros PCI-E GbLAN Controller AR8131M Chip
- Supports 10Mb/s, 100Mb/s and 1000Mb/s
Compliant with PCI-Express bus specification v1.0a.
Ports & slots
Onboard USB headers6 USB 2.0 ports (backplane)

Questions about this item

What does the 16GB maximum memory mean for a build using this board?

The board supports up to 16GB of dual-channel DDR3 across its slots, so a typical four-slot configuration can hold four 4GB modules running at speeds up to 2000MHz when overclocked.

How does the PCI Express 2.0 x16 slot limit graphics performance in practice?

The primary slot runs at PCIe 2.0 x16 speed, which caps bandwidth at the 2.0 generation level; modern cards will work but cannot exceed that link throughput.

What physical clearance does the ATX form factor and back-panel I/O shield require in a case?

The board follows the standard ATX layout and ships with a chassis I/O back panel, so it fits any case designed for ATX motherboards with matching mounting holes.

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