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Gigabyte 890FXA-UD7

Five AMD 890FX-Based Motherboards Compared

The -UD7 suffix represents Gigabyte’s extended feature products, or in the case of its 890FXA-UD7, an extended circuit board. That’s right, the GA-890FXA-UD7 demands at least an eight-slot case (with examples from ABS, Lian-Li, and Thermaltake) simply to make all seven of its slots accessible, though a larger nine-slot or 10-slot model would be handy for installing a large graphics card in its bottom slot.

Second to its ability to support four double-slot graphics card (in a nine-slot or larger case) is the 890FXA-UD7’s interchangeable chipset cooling system. Equipped from the factory with a 3/8” water block, removing that piece allows the installation of Gigabyte’s enormous Silent-Pipe multi-component heat sink. The Silent-Pipe’s secondary radiator extends through a case’s uppermost expansion slot, relying on the air pressure difference between the inside and outside of the case for airflow.

Silent-Pipe might be Gigabyte’s best excuse for extending this seven-slot motherboard by one space (0.8”) beyond the full ATX (12”) standard to its final eight-slot (12.8”) length. While Silent-Pipe might not be valuable enough on its own to justify Gigabyte’s oversized-case requirement, positioning the 890FX northbridge closer to the board’s center could also aid in overclocking stability, while putting its PCIe 2.0 controller closer to the slots it serves.

Gigabyte makes all of the 890FXA-UD7’s PCIe 2.0 slots x16-length, supporting two cards at full bandwidth in slots one and five or up to four cards at x8 transfer mode through slots one, three, five, and six. Those two configurations could make the 890FXA-UD7 the ultimate gaming platform for AMD processors. Users with less-elaborate 3D performance requirements might even find uses for the second and fourth slots at x4 and x1 transfers, and those willing to sacrifice two SATA ports and Ultra ATA, can even configure the fourth slot to x4 mode.

The 890FXA-UD7 supports up to 12 hard drives via three ATA controllers, including the SB850’s six SATA 6Gb/s ports. Gigabyte adds two eSATA 3Gb/s and two SATA 3Gb/s ports via separate JMicron controllers, while the internal controller also adds up to two Ultra ATA drives at up to 133 MB/s.

Looking beyond the 890FXA-UD7’s surprising size and number of x16-length slots, other surprises include a layout that actually favors real-world case designs. For example, both the Ultra ATA and floppy connector are located in their traditional locations, which is something we haven’t seen on a high-end board for a few years. Anyone trying to hold onto legacy external ATA drives should be very pleased with the shorter cable reach, while users who swear by Windows XP’s lower overhead will be pleased to find the floppy interface—required for adding AHCI or RAID drivers during setup—directly behind the 3.5” external bay of traditional cases. Another example of this idealized layout is the bottom-rear corner, which is the perfect location for connecting a serial and communications port breakout plate but not much else.

Gigabyte slides all of the 890FXA-UD7’s bottom-edge “front panel” connectors forward for easier cable reach, leaving us only with the concern that associated cable ends typically don’t fit under the heat sinks of large graphics cards. This is, after all, a four-way CrossFireX design, and the extra-long circuit board could have allowed placing these connectors slightly above that slot. Given that the board already requires an oversized case, Gigabyte could have also used downward-facing, right-angle connectors without changing the board’s layout, but most builders who place a graphics card in the bottom slot will be left trying to crush their cables down to fit under the card’s heat sink. If that last suggestion doesn’t sound ideal, liquid-cooled graphics cards are always an option…

A few final features worth noting are bench test-friendly power, reset, and CLR_CMOS buttons, a tuner-friendly port 80 diagnostics display, and Gigabyte’s new 3X USB Power technology with the capability to charge devices through ports on the white USB header—even when the PC is shut off.

BIOS Features

Gigabyte’s M.I.T. menu includes a wide range of clock speed, ratio, and voltage controls.

Advanced DRAM timings are found in a submenu that also contains drive-strength settings.

Up to eight BIOS configurations can be stored as user profiles in a protected area of flash memory and the most recent “good” settings can also be retrieved using the “Last Known Good” option.


The 890FXA-UD7 includes four internal SATA cables, two SATA-to-eSATA cables, a four-pin-to-dual-SATA power adapter, and an internal SATA-to-eSATA breakout plate with a four-pin power extension.

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