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ATX motherboard with black PCB, silver heatsinks, four DDR3 slots, two PCIe x16 slots, rear I/O panel with HDMI, DisplayPort, USB ports

GIGABYTE

GIGABYTE GA-Z77X-UD3H LGA 1155 Intel motherboard

SKU CH-A0VV-8EMPK

ATX board for LGA 1155 CPUs with Intel Z77 chipset, four DDR3 slots up to 32 GB, dual PCIe 3.0 x16, six USB 3.0 ports and 8-channel audio

  • ProcessorCore i7 / i5 / i3 (LGA1155)
  • ChipsetIntel Z77
  • Form factorATX
  • CPU socketLGA 1155
  • Memory slot count4 × 240pin
  • Supported memoryDDR3 2666(OC)/1600/1333/1066
  • Supports Core i7, i5 and i3 processors on LGA 1155 socket
  • Dual-channel DDR3 memory up to 32 GB across four 240-pin slots
  • Two PCI Express 3.0 x16 slots for multi-GPU configurations at x16 or x8 speeds
  • Eight-channel audio via VIA VT2021 codec with optical S/PDIF output
  • Six USB 3.0 ports plus two eSATA 6 Gb/s connectors on the rear I/O panel

Socket LGA 1155 Z77 motherboard

The GIGABYTE GA-Z77X-UD3H is an ATX board built around the Intel Z77 chipset for second- and third-generation Core i7, i5 and i3 processors. Four 240-pin slots accept DDR3 memory at 1066, 1333, 1600 or 2666 MT/s when overclocked, topping out at 32 GB in dual-channel mode.

Standard ATX layout with legacy PCI slot

Installation follows the usual ATX pattern: nine mounting holes, a 24-pin and an 8-pin power connector, and front-panel headers in the expected positions. The single legacy PCI slot sits below the three PCIe x1 slots, so a long card in the second PCIe 3.0 x16 slot can block the PCI slot; plan card order before tightening screws.

Dual x16 PCIe 3.0 and six USB 3.0 ports

Two PCI Express 3.0 x16 slots run at x16 and x8, giving ample bandwidth for twin graphics cards, while a third x16 slot is wired at x4 via PCIe 2.0. Six rear USB 3.0 ports, two eSATA 6 Gb/s ports and four internal SATA 3 Gb/s ports handle most storage needs; the onboard mSATA connector disables one internal SATA port when populated.

How it compares

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

Price $83.99
Cheaper than about 59% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameGIGABYTE
Model nameGA-Z77X-UD3H
Processor
ProcessorCore i7 / i5 / i3 (LGA1155)
CPU socketLGA 1155
ChipsetIntel Z77
Memory
Memory slot count4 × 240pin
Supported memoryDDR3 2666(OC)/1600/1333/1066
Max supported RAM32 GB
Memory channelsDual Channel
Storage
SATA ports2 x SATA 6Gb/s
SATA and RAID support0/1/5/10
Audio & video
Audio chipVIA VT2021
Sound channels8 Channels
Connectivity
Maximum network speed1 Gbit/s
Ports & slots
PCIe 3.0 x16 slots2 (x16, x8)
PCIe x1 slots3 x PCI Express x1
PCI slots1 x PCI Slot
Rear panel ports1 x DisplayPort / 1 x HDMI / 1 x Optical S/PDIF Out / 1 x PS/2 Keyboard/Mouse Combo / 2 x eSATA 6 GB/S / 6 x USB 3.0
PS/2 ports1 x PS/2 keyboard/mouse port
Video connectorsD-Sub + DVI
HDMI ports1 x HDMI
DisplayPort connectors1 x DisplayPort
USB 3.0 ports6 x USB 3.0
S/PDIF output1 x Optical
Audio jacks6 Ports
Onboard USB headers2 x USB 3.0 + 6 x USB 2.0
Power
Power connectors24 Pin
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
More details
PCI express 2.0 x161 @x4
ESATA2 x eSATA 6Gb/s

Questions about this item

How do I confirm the board is posting correctly after installing a Core i7 LGA 1155 CPU and DDR3 memory?

Power on the system and watch for the BIOS splash screen or listen for a single beep from the onboard speaker; if the display shows the UEFI setup screen or boots to your OS installer, the motherboard is operating as intended.

What components are included with the GA-Z77X-UD3H and what must I source separately?

The box contains the ATX motherboard, I/O shield, SATA cables, driver disc and manual; you will need to purchase an LGA 1155 processor, DDR3 DIMMs, a power supply, storage drives and a chassis separately.

Which memory speed should I select for the four 240-pin slots — 1066, 1333, 1600 or 2666 OC?

For plug-and-play stability choose DDR3 1600 modules; 2666 requires manual overclocking in the BIOS and compatible high-performance DIMMs, while 1066 and 1333 will run at lower bandwidth.

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