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Rectangular ATX motherboard with black PCB and silver heatsinks, LGA 1155 socket, four DDR3 slots, PCIe x16 and x1 slots, SATA ports

MSI

MSI B75A-G43 B75 LGA 1155 DDR3 32GB ATX Intel motherboard

SKU CH-H61T-54YYF

ATX board with Intel B75 chipset, LGA 1155 socket, dual-channel DDR3 up to 32 GB, one PCIe 3.0 x16 slot, 8.1-channel audio and gigabit LAN

  • CPU Socket TypeLGA 1155
  • CPU TypeThird-generation Intel Core i7/Core i5/Core i3/Pentium/Celer
  • ChipsetIntel B75
  • Memory StandardSupports dual-channel DDR3 1600/1333/1066/1800 (OC)/2000 (OC
  • Maximum Memory Supported32GB
  • PCI Slots1 x PCIe 3.0 x16 slot PCI_E2 up to PCIe 3.0 x16 speeds 1 x P
  • Supports up to 32GB DDR3 memory for multitasking
  • Dual-channel DDR3 up to 2200 MHz OC for speed
  • PCIe 3.0 x16 slot enables modern graphics cards
  • Realtek ALC892 provides 8.1-channel audio
  • Gigabit LAN via Realtek 8111E for wired networking

LGA 1155 DDR3 ATX motherboard

The MSI B75A-G43 uses the Intel B75 chipset and an LGA 1155 socket for third-generation Core i7, i5, i3, Pentium and Celeron processors. It supports up to 32GB of dual-channel DDR3 memory across four slots. The ATX form factor provides three PCIe x16 physical slots and two PCIe x1 slots for expansion cards. Onboard audio uses the Realtek ALC892 codec with 8.1-channel output.

PCIe 3.0 x16 primary slot

The top PCIe slot runs at PCIe 3.0 x16 electrical speed and is the single specification that determines graphics-card bandwidth. A second x16-sized slot operates at PCIe 2.0 x16, while a third x16-sized slot is limited to PCIe 2.0 x4. Two additional x1 slots and six SATA ports (one SATA III, five SATA II) complete the I/O layout. Two USB 3.0 rear ports and one internal USB 3.0 header come from the chipset.

Sustained load behaviour

The Realtek 8111E Gigabit LAN controller handles continuous network traffic without a dedicated offload engine. The B75 chipset manages steady USB 3.0 and SATA throughput within its rated lane allocation. Voltage-regulation components cool passively, so case airflow determines thermal headroom during long compute or storage sessions. Audio and networking share the PCIe 2.0 general-purpose lanes.

Highlights

  • Supports up to 32GB DDR3 memory for multitasking
  • Dual-channel DDR3 up to 2200 MHz OC for speed
  • PCIe 3.0 x16 slot enables modern graphics cards
  • Realtek ALC892 provides 8.1-channel audio
  • Gigabit LAN via Realtek 8111E for wired networking

Specifications

BrandMSI
SeriesMSI B75A-G43
ModelMSI B75A-G43
CPU Socket TypeLGA 1155
CPU TypeThird-generation Intel Core i7/Core i5/Core i3/Pentium/Celeron processors that support Socket 1155 architecture
ChipsetIntel B75
Memory StandardSupports dual-channel DDR3 1600/1333/1066/1800 (OC)/2000 (OC)/2200 (OC) MHz memory
Maximum Memory Supported32GB
PCI Slots1 x PCIe 3.0 x16 slot
PCI_E2 up to PCIe 3.0 x16 speeds
1 x PCIe 2.0 x16 slot
PCI_E4 supports up to PCIe 2.0 x4 speeds
2 x PCIe 2.0 x1 slots
3 x PCIe slots
SATA RAID5XSATA II interface; 1xSATA III interface
Audio ChipsetRealtek ALC892 Audio Chip
- 8.1 channel sound effects that support intelligent sound interface detection
Compatible with Azalia 1.0 specifications
LAN Chipset1 PCI Express network port supports 10/100/1000 Fast Ethernet provided by Realtek 8111E
Onboard USBIntel B75 chip supports two USB 3.0 I/O ports
Intel B75 chip supports a USB 3.0 internal port

Questions about this item

Will this board take a third-generation Core i5 or i7 processor?

Yes, the LGA 1155 socket supports third-generation Intel Core i7, Core i5, Core i3, Pentium and Celeron CPUs that use the Socket 1155 architecture.

What DDR3 memory speeds are supported and what is the maximum capacity?

The board runs dual-channel DDR3 at 1066, 1333 and 1600 MHz natively, with overclocked options at 1800, 2000 and 2200 MHz, up to a total of 32 GB.

Which expansion slots are available for a graphics card and additional add-in cards?

One PCIe 3.0 x16 slot and one PCIe 2.0 x16 slot (running at x4) are provided for graphics, plus two PCIe 2.0 x1 slots for other expansion cards.

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