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Green rectangular Micro ATX motherboard with silver heatsinks, black slots and rear I/O panel

MSI

MSI H81M-P33 LGA 1150 Intel H81 Micro ATX Intel motherboard

SKU CH-3B67-EPB40

A Micro ATX board for LGA 1150 CPUs with dual-channel DDR3 up to 16 GB, one PCIe 2.0 x16 slot, two SATA 6Gb/s ports, two USB 3.0 ports, Realtek 8-channel audio and gigabit LAN

  • ProcessorCore i7 / i5 / i3 / Pentium / Celeron (LGA1150)
  • ChipsetIntel H81
  • Form factorMicro ATX
  • CPU socketLGA 1150
  • Memory slot count2 × 240pin
  • Supported memoryDDR3 1600/1333/1066
  • Supports Intel Core i7, i5, i3, Pentium and Celeron LGA 1150 processors
  • Dual-channel DDR3 memory up to 16 GB at 1600, 1333 or 1066 MHz
  • Two SATA 6 Gbps ports for fast storage connectivity
  • Two USB 3.0 and four USB 2.0 ports on the rear I/O panel
  • Realtek ALC887 8-channel audio and Realtek 8111G Gigabit LAN built in

Socket and chipset

The MSI H81M-P33 is a micro ATX motherboard built around the Intel H81 chipset and the LGA 1150 socket. It accepts Core i7, i5, i3, Pentium and Celeron processors from that generation. Two 240-pin slots support up to 16 GB of DDR3 memory at 1600, 1333 or 1066 MHz in dual-channel mode.

Expansion and I/O layout

A single PCI Express 2.0 x16 slot handles a graphics card while one PCI Express x1 slot is available for add-in cards. Two SATA 6 Gb/s ports connect storage drives. The rear panel provides two USB 3.0 ports, four USB 2.0 ports, PS/2 keyboard and mouse connectors, a DVI-D output, and a Gigabit LAN port driven by the Realtek 8111G controller. Onboard audio uses the Realtek ALC887 codec for 8-channel sound.

Military Class 4 and BIOS tools

Military Class 4 components are specified for enhanced stability during extended operation. The M-Flash utility lets you back up or restore the BIOS to a USB flash drive, reducing rewrite cycles on the firmware chip. Live Update 5 automates BIOS and driver updates to keep the platform current without manual intervention.

How it compares

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

Price $51.99
Cheaper than about 84% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameMSI
Model nameH81M-P33
Processor
ProcessorCore i7 / i5 / i3 / Pentium / Celeron (LGA1150)
CPU socketLGA 1150
ChipsetIntel H81
Memory
Memory slot count2 × 240pin
Supported memoryDDR3 1600/1333/1066
Max supported RAM16 GB
Memory channelsDual Channel
Storage
SATA ports2 x SATA 6Gb/s
Audio & video
Audio chipRealtek ALC887
Sound channels8 Channels
Connectivity
Ethernet controllerRealtek 8111G
Maximum network speed1 Gbit/s
Ports & slots
PCIe x1 slots1 x PCI Express x1
Rear panel ports2 x PS/2 / 2 x USB 3.0 / 4 x USB 2.0/1.1
PS/2 ports1 x PS/2 keyboard port1 x PS/2 mouse port
Video connectors1 x DVI-D1 x Graphics card port
Ethernet port1 x RJ45
USB 3.0 ports2 x USB 3.0
USB 2.0 ports4 x USB 2.0
Audio jacks1 × 3 in 1 audio jack
Onboard USB headers2 x USB 2.0 connectors
Power
Power connectors24 Pin
Size & build
Form factorMicro ATX
Width and length8.9 in × 6.81 in
More details
PCI express 2.0 x161 x PCI Express 2.0 x16

Questions about this item

How much DDR3 memory can the H81M-P33 accept in total?

The board has two 240-pin slots and supports up to 16 GB of DDR3 running at 1600, 1333 or 1066 MHz in dual-channel mode.

What noise or heat should I expect from the H81M-P33 during all-day operation?

The H81 chipset and Military Class 4 components run passively cooled; only the CPU and case fans produce audible noise under sustained load.

Which parts must I already own to assemble a working system with this motherboard?

You need an LGA 1150 processor, DDR3 DIMMs, a Micro-ATX compatible case and power supply, plus a graphics card for video output.

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