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Rectangular ATX motherboard with black PCB, silver heatsinks and blue expansion slots

MSI

MSI 870-SG45 AMD 770 AM3 DDR3 8GB ATX motherboard

SKU CH-QDV3-ST7QX

Socket AM3 ATX board with AMD 770 chipset, dual-channel DDR3 up to 1600 MHz, 8 GB maximum, one PCIe 2.0 x16 slot, six SATA ports, Realtek ALC887 eight-channel audio and RTL8111 Gigabit LAN

  • 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 1600 (overclocking)/1333/1066/800
  • Max supported RAM8 GB
  • PCI slots1 PCI Express x16 slot supports PCIE 2.0 × 16 speed executio
  • Supports AMD Phenom II and Athlon II processors with Socket AM3 compatibility
  • Dual-channel DDR3 memory up to 1600 MHz overclocking for responsive multitasking
  • One PCI Express 2.0 x16 slot plus three x1 slots for graphics and add-in cards
  • Six SATA II ports provide ample connectivity for storage drives
  • Realtek ALC887 8-channel audio and RTL8111 gigabit LAN for sound and networking

Socket AM3 platform

The MSI 870-SG45 uses the AMD 770 chipset and a Socket AM3 interface to support 64-bit Phenom II and Athlon II processors in a standard ATX layout. It targets builders who need a reliable foundation for older AMD desktop CPUs.

Dual-channel DDR3 stability

Four memory slots accept dual-channel DDR3 at 1600, 1333, 1066 and 800 MHz with a maximum capacity of 8 GB. The AMD 770 chipset and board power delivery maintain consistent throughput during extended workloads rather than short bursts.

Expansion and connectivity layout

One PCI Express 2.0 x16 slot, three PCI Express x1 slots and two legacy PCI slots give wide add-in card flexibility. Six SATA II ports, four rear USB 2.0 ports, Realtek ALC887 8-channel audio and a Realtek RTL8111 Gigabit LAN controller cover storage, peripherals and networking needs.

How it compares

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

Price $33.99
Cheaper than about 95% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Product lineMSI 870-SG45
Model nameMSI 870-SG45
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 1600 (overclocking)/1333/1066/800 MHz memory
Max supported RAM8 GB
Storage
SATA and RAID support6XSATA II interface
Audio & video
Audio chipRealtek ALC887 Chip
- Supports 8-channel sound effects detected by intelligent sound interface
Compatible with Azalia 1.0 specifications
Connectivity
Ethernet controllerRealtek PCI-E 10/1000 LAN Controller RTL8111 Chip
- Support 10Mb/s, 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
3 PCI Express x1 slots
2 PCI slots, supporting 3.3v/5v PCI main bus interface
Onboard USB headers4 USB 2.0 ports (backplane)

Questions about this item

How much power does the AMD 770 chipset draw when the system runs continuously?

The AMD 770 chipset is a low-heat northbridge without an active fan, so sustained load adds only a few watts beyond the CPU and memory draw.

Which AM3 processor and DDR3 memory must I already have to boot this board?

You need a Socket AM3 CPU such as a Phenom II X6/X4/X3/X2, Athlon II X4/X3/X2 or Sempron, plus up to 8 GB of dual-channel DDR3 1600/1333/1066/800 MHz modules.

Will my PCI Express 1.0a graphics card and PCI add-in cards work in the available slots?

Yes — the single PCIe 2.0 x16 slot is backward compatible with PCIe 1.0a cards, and the two 3.3 V / 5 V PCI slots accept legacy PCI expansion cards.

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