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Green Micro ATX motherboard with silver LGA 1155 socket, blue DDR3 slots and black PCIe x16 slot

MSI

MSI B75MA-P45 LGA 1155 B75 DDR3 32GB Micro ATX Intel motherboard

SKU CH-0Y4N-WKQEY

Micro-ATX board with LGA 1155 socket, Intel B75 chipset, dual-channel DDR3 up to 32GB, PCIe 3.0 x16, SATA III and II, Realtek 8111E Gigabit LAN, 8-channel audio

  • CPU Socket TypeLGA 1155
  • CPU TypeThird-generation Intel Core i7/Core i5/Core i3/Pentium/Celer
  • ChipsetIntel B75
  • Memory StandardSupports dual-channel DDR3 2200 (overclocking)/2000 (overclo
  • Maximum Memory Supported32GB
  • PCI Slots1 PCIe 3.0 x16 slot 1 x PCIe 2.0 x1 slot 1 x PCI slot
  • Supports third-generation Intel Core i7, i5, i3, Pentium and Celeron processors via LGA 1155 socket
  • Up to 32GB dual-channel DDR3 memory at speeds up to 2200MHz overclocked
  • PCIe 3.0 x16 slot for modern graphics cards plus legacy PCI and PCIe 2.0 x1 slots
  • Realtek ALC887 8-channel audio with Azalia 1.0 compliance
  • Gigabit LAN via Realtek 8111E plus two USB 3.0 rear ports and one internal USB 3.0 header

Socket 1155 micro-ATX board for third-gen Intel CPUs

The MSI B75MA-P45 fits LGA 1155 processors from the third-generation Core i7, i5, i3, Pentium and Celeron families. It uses the Intel B75 chipset on a micro-ATX form factor, making it suited for compact business or home-office builds that need legacy platform support.

B75 chipset thermals with passive cooling

The B75 chipset runs without an active fan, so system noise depends only on the CPU cooler and case airflow chosen by the builder. Power draw stays within standard micro-ATX limits for the supported 1155 processors, and the board provides a single PCIe 3.0 x16 slot, one PCIe 2.0 x1 slot and one PCI slot for expansion.

Back-panel I/O shield.

The package includes a chassis I/O back panel, a replacement CMOS battery and a single SATA cable for the six onboard SATA ports — five SATA II and one SATA III. No Wi-Fi antenna is supplied because the board has no integrated wireless module, and no driver disc or manual is included.

Points forts

  • Supports third-generation Intel Core i7, i5, i3, Pentium and Celeron processors via LGA 1155 socket
  • Up to 32GB dual-channel DDR3 memory at speeds up to 2200MHz overclocked
  • PCIe 3.0 x16 slot for modern graphics cards plus legacy PCI and PCIe 2.0 x1 slots
  • Realtek ALC887 8-channel audio with Azalia 1.0 compliance
  • Gigabit LAN via Realtek 8111E plus two USB 3.0 rear ports and one internal USB 3.0 header

Caractéristiques

BrandMSI
SeriesMSI B75MA-P45
ModelMSI B75MA-P45
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 2200 (overclocking)/2000 (overclocking)/1800 (overclocking)/1600/1333/1066MHz memory
Maximum Memory Supported32GB
PCI Slots1 PCIe 3.0 x16 slot
1 x PCIe 2.0 x1 slot
1 x PCI slot
SATA RAID5XSATA II interface; 1xSATA III interface
Audio ChipsetRealtek ALC887 Audio Chip
- Supports 8-channel sound effects detected by intelligent sound interface
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
Intel B75 chip supports a USB 3.0 internal port

Questions sur cet article

How do I install the CPU into the LGA 1155 socket without bending pins?

Lift the retention lever, align the processor notches with the socket keys, place the CPU gently without force, lower the frame, and lock the lever back down; the lever tension secures the chip.

When will the onboard CMOS battery need replacement and what are the signs?

The battery keeps the real-time clock and BIOS settings alive; when the system starts losing time or reverting to default BIOS defaults on every boot, replace the cell.

What thermal limit appears first when the PCIe 3.0 x16 slot runs a heavy GPU load for hours?

The VRM heatsink area around the socket reaches its saturation point before the chipset does, so case airflow directed at that zone becomes the practical ceiling.

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