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The Gigabyte GA-H55M-UD2H is a low-cost motherboard for Intel LGA1156 format CPUs.

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Excellent price for a CrossFireX-capable LGA1156 motherboard.

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CrossFireX-capable microATX board--great layout eliminates any possible awkwardness.

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Surprisingly good overclocking performance--doesn't overheat despite the compact size.

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"Advanced BIOS" really is very fully featured and well laid out.

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Some notable stability issues concerning the SATA ports could lead to a dead mobo.

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Second PCI-E x16 slot is limited to x4.

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Doesn't have much room for more than a couple fan connectors.

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Doesn't fit microATX mounting standards 100%--installation may be a hassle.

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  • Only 3 words are allowed.


The Gigabyte GA-H55M-UD2H is a low-cost motherboard for Intel LGA1156 format CPUs. This MicroATX format board is similar to the Gigabyte GA-H55M-D2H, but has a number of extra features to support multimedia work, including an eSATA port for external storage and 2 IEEE 1394a FireWire ports. Further enhancements include the inclusion of D-Sub, DVI-D, DisplayPort and HDMI ports for use if a CPU is installed with graphics processing capabilities. If more graphics processing is required, 2 PCI-E slots enable the use of ATI CrossFireX technology to allow multiple video cards to work in tandem. High definition audio processing is also built in, and optical S/PDIF outputs enable lossless transmission of the audio signal. 

  • MicroATX Form Factor; 24.4cm x 23cm
  • Intel LGA1156 CPU slot, supports Intel Core i7 series, Intel Core i5 series, Intel Core i3 series
  • 4 x DDR3 DIMM sockets, up to 16 GB
  • Dual channel memory architecture
  • Support for DDR3 2200+/1800/1600/1333/1066/800 MHz memory modules
  • On-board audio: Realtek ALC889, High Definition Audio, 2/ 4/ 5.1/ 7.1-channel
  • Support for S/PDIF In/Out, CD In
  • 10/100/1000 Ethernet, RTL8111E chip
  • 1 x PCI Express x16, 1 x PCI Express x4, 2 x PCI slots
  • 1 x IDE connector
  • Support for ATI CrossFireX technology
  • 5 x SATA 3Gb/s connectors
  • 1 x eSATA 3Gb/s connector
  • Up to 12 USB 2.0/1.1 ports
  • Up to 2 IEEE 1394a (FireWire) ports
  • PS/2 keyboard or PS/2 mouse port, D-Sub port, DVI-D port, HDMI port, DisplayPort, IEEE 1394a port, optical S/PDIF Out connector, 6 x USB 2.0/1.1 ports, eSATA 3Gb/s connector, RJ-45 port, 6 x audio jacks (Center/Subwoofer Speaker Out/Rear Speaker Out/ Side Speaker Out/Line In/Line Out/Microphone)
  • Support for Microsoft Windows 7/Vista/XP
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