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Black ATX motherboard with silver heatsinks and blue PCIe slots

MSI

MSI Z77A-G45 LGA 1155 Intel Z77 DDR3 32GB ATX motherboard

SKU CH-XPDD-SGPDZ

Supports 3rd Gen Intel Core i7, i5, i3, Pentium and Celeron CPUs on LGA 1155 with dual-channel DDR3 up to 2800MHz and 32GB maximum memory

  • Processor3rd Gen Intel Core ™ i7/Core ™ i5/Core ™ i3/Pentium/Celeron
  • ChipsetIntel Z77
  • CPU socketLGA 1155
  • Supported memorySupports dual-channel DDR3 2800 (overclocking)/2677 (overclo
  • Max supported RAM32 GB
  • PCI slots2 x PCIe 3.0 x16 slots 1 x PCIe 2.0 x16 slot - PCI_E7 suppor
  • Supports 32GB dual-channel DDR3 up to 2800MHz
  • Two PCIe 3.0 x16 slots for multi-GPU configurations
  • Intel Z77 chipset with native USB 3.0 I/O and internal ports
  • Realtek ALC892 delivers 8.1 channel audio with intelligent detection
  • Realtek 8111E Gigabit LAN provides 10/100/1000 network connectivity

Socket 1155 Z77 ATX Board

The MSI Z77A-G45 is an ATX motherboard built around the Intel Z77 chipset for LGA 1155 processors. It accepts third-generation Core i7, i5, i3, Pentium and Celeron CPUs. Dual-channel DDR3 memory runs up to 2800 MHz when overclocked with a maximum capacity of 32 GB. The board targets builders assembling or repairing systems on this platform.

Installation Notes

The ATX layout follows standard mounting points and the CPU socket uses the familiar LGA 1155 retention mechanism. Four SATA II and two SATA III ports are grouped along the edge for straightforward cable routing. Two PCIe 3.0 x16 slots and one PCIe 2.0 x16 slot share bandwidth, so populating multiple graphics cards can reduce the third slot to x4 speeds. The rear I/O shield is supplied separately and must be fitted before the board is lowered into the case.

Who Should Buy

Enthusiasts maintaining an existing LGA 1155 build or upgrading memory to the full 32 GB will find the feature set appropriate. The 8.1-channel Realtek ALC892 audio and single Gigabit LAN port cover basic multimedia and networking needs. Users requiring native USB 3.1, M.2 storage or support for newer CPU generations should select a more recent platform.

How it compares

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

Price $65.99
Cheaper than about 73% of the 2,965 comparable items (median $97.99).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameMSI
Product lineMSI Z77A-G45
Model nameMSI Z77A-G45
Processor
Processor3rd Gen Intel Core ™ i7/Core ™ i5/Core ™ i3/Pentium/Celeron processors with Socket 1155 architecture
CPU socketLGA 1155
ChipsetIntel Z77
Memory
Supported memorySupports dual-channel DDR3 2800 (overclocking)/2677 (overclocking)/2600 (overclocking)/2400 (overclocking)/2200 (overclocking)/2133 (overclocking)/2000 (overclocking)/1866 (overclocking)/1600/1333/1066 MHz memory
Max supported RAM32 GB
Storage
SATA and RAID support4XSATA II interface; 2xSATA III interface
Audio & video
Audio chipRealtek ALC892 Audio Chip
- 8.1 channel sound effects that support intelligent sound interface detection
Compatible with Azalia 1.0 specifications
Connectivity
Ethernet controller1 PCI Express network port supports 10/100/1000 Fast Ethernet provided by Realtek 8111E
Ports & slots
PCI slots2 x PCIe 3.0 x16 slots
1 x PCIe 2.0 x16 slot
- PCI_E7 supports PCIe 2.0 x4 speeds
4 x PCIe 2.0 x1 slots
Onboard USB headersIntel Z77 chip supports two USB 3.0 I/O ports
Intel Z77 chip supports a USB 3.0 internal port

Questions about this item

How can I confirm the Realtek ALC892 audio is functioning after I install the board?

Boot the system, open the sound control panel and verify that 8.1 channel output is detected and that the Azalia 1.0 driver loads without errors.

What ships with the motherboard and what must I source myself?

The box contains the board, a CMOS battery, one SATA cable and the rear I/O shield; you will need to supply a CPU, DDR3 memory modules, storage drives and a power supply.

Which memory speed should I select for the Z77A-G45 given its supported DDR3 frequencies?

Choose DDR3 modules rated at 1600 or 1333 MHz for native operation; faster kits up to 2800 MHz will run only when overclocked in the BIOS.

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