GIGABYTE GA-990FXA-UD3 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard

3.7 out of 5 stars 654 ratings

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  • Storage Interface:6 x SATA 6Gb/s connectors,Support for SATA RAID 0, RAID 1, RAID 5,RAID 10 and JBOD, 2 x eSATA 6Gb/s Support for RAID 0 and RAID 1
  • Expansion Slots: 2 x PCI Express x16 slot running at x16 ,1x PCI Express x4 slots, 2 x PCI Express x1 slot, 1x PCI slots
  • Memory: 4 x 1.5V DDR3 DIMM sockets supporting up to 32 GB of system memory.
  • CPU: AM3+/AM3/AMD Athlon II Chipsets: AMD 990FX/AMD SB950. Revision 1.1.
  • Audio: Realtek ALC889 codec , High Definition Audio, Dolby Home Theater, 2/4/5.1/7.1-channel, LAN: 10/100/1000 Mbit
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Supports newest AMD AM3+ FX/AM3 Phenom II series processors, Advanced 8+2 phase CPU VRM power design for AMD high-TDP CPU support,3 PCI-E 2.0 interfaces for 2way AMD CrossFireX and SLI multi-graphics support, AMD SB950 provides 6 native SATA3 ports with superfast 6Gbps link speed and RAID 0, 1, 5, 10 support, Supports USB 3.0 with superfast transfer rates of up to 5 Gbps, GIGABYTE 3x USB Power with On/Off Charge USB ports, Ultra Durable 3 Classic Technology with copper cooled quality for lower working temperature, Turbo XHD technology accelerating hard drive performance with ease, Revolution energy saving design with Easy Energy Saver technology, Hi-def 108dB Signal-to-noise ratio Blu-ray DVD audio playback, Patented DualBIOS with Hybrid EFI technology for 3TB HDD support, Supports Dolby Home Theater audio,

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3.7 out of 5 stars
3.7 out of 5
654 global ratings

Top reviews from the United States

Reviewed in the United States on May 24, 2015
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4.0 out of 5 stars Good motherboard, but will not run 64-bit Linux out of the box. Easy to fix, though.
By David A. Jayne on May 24, 2015
I used this board in a new system, and while it seems to be a fine motherboard overall, getting 64-bit Linux to work with it requires two minor tweaks.

First, in the BIOS settings, under the Peripherals tab, you must set "IOMMU Controller" option to "Enabled". Without this setting, USB will not work at all under Linux. My understanding is that the integrated NIC will not work either, but I had it set properly before I got that far (I used a GParted live CD for partitioning prior to installation). USB mice and keyboards still work fine in the BIOS settings, so no worries making this simple change.

Secondly, once Linux is installed USB 3.0 ports will not work (they don't fall back to 2.0 or anything, they are just dead) until you add GRUB_CMDLINE_LINUX="iommu=soft" to /etc/default/grub and then run update-grub (Debian) or grub2-mkconfig (Red Hat) to apply the change.

I have attached screenshots to illustrate these changes. If you are new to Linux and not sure how to complete these steps, I will cover the process below.

Once these changes have been made, everything seems to work just fine. All USB ports are active and the NIC card is recognized without problem.

I ran into these issues installing Linux Mint 17.1, but I imagine they will exist for any Debian-based distribution. I'm not sure if Red Hat derived distros need the same tweaks or not. Also, while researching this, it seemed that only 64-bit versions of Linux have this issue, though you should certainly be running a 64-bit OS to take full advantage of the CPU's this motherboard is designed to use.

One other idiosyncrasy I have noticed is that if I have my ext4 formatted 1TB USB drive plugged in on boot, the BIOS POST seems to take forever. I will stare at the BIOS splash screen for what seems like an eternity. This seems to happen whether or not the BIOS is set to boot from USB, and only with that large ext4 drive. A 32GB fat32 thumb drive causes no issues. I believe there is a BIOS setting to ignore specific drives in the boot process that can prevent this, but I haven't yet tried it.

I should mention that these issues exist as of May, 2015, and will probably be cleared up after one or two kernel releases and/or BIOS upgrades. Mine is a revision 4.0 board with BIOS version F2 (the most recent stable version available). My kernel version is 3.13.0-37-generic.

OK, so here are the step-by-step instructions if you need them:

*** Step 1: Updating the BIOS settings ***

- Reboot your computer, and press the "Delete" key (not to be confused with backspace) when the Gigabyte logo shows on your monitor to enter the BIOS settings. This can flash by pretty quickly, so sometimes it's easier to just repeatedly press delete while the computer restarts until the BIOS settings page shows (see attached screenshot).
- Use the right arrow key to move over to the "Peripherals" tab.
- Use the down arrow key to highlight "IOMMU Controller" near the bottom. Press enter, and a box will pop up allowing you to select "Enabled" or "Disabled". Use the up or down arrow keys to highlight "Enabled" and press enter. Your screen should now look exactly like the screenshot I have provided, the "IOMMU Controller" option showing that it is enabled.
- Press the F10 key to save and exit.

Your computer will now reboot. If you have not yet been able to install Linux (and you probably haven't, if you have a USB mouse and keyboard) do so now. Don't plug your mouse or keyboard into any blue USB ports, as these are USB 3.0 ports and will not yet work. Once Linux has installed (or if it was already installed) boot your computer into Linux and proceed to Step 2.

*** Step 2: Editing /etc/default/grub ***

- Once you see your Linux desktop, open a command prompt from the start menu. This is usually prominently featured on the start menu, looking like a little black monitor screen. It may be under "Accessories" and will probably be labeled "Terminal".
- At the command prompt, enter the following exactly:
sudo nano /etc/default/grub

- You will be prompted to enter your password. Please do so. A simple-to-use text editor (nano) will open, and you should see a fair amount of text inside. If the file is empty, press ctrl-x to exit and Google search for instructions for your particular distro.
- There is probably already a line that says GRUB_CMDLINE_LINUX="", and you will just need to add "iommu=soft" between the quotes. Use the arrow keys to position the cursor between the quotes and add the appropriate text until the line looks exactly like the following:

If there is no similar line already there, you may add it anywhere in the file. If there is a pound sign (#) at the beginning of the line, it will need to be deleted.

- Once the GRUB_CMDLINE_LINUX line has been edited, press ctrl-o to save it, and then ctrl-x to exit nano.
- You need to enter one more command to finalize the new configuration, but it varies by distribution.

If you are on a Debian-based distribution (Debian, Ubuntu, Mint...), enter this command in the terminal window:
sudo update-grub

If you are on a Red Hat based distribution (RHEL, Fedora, CentOS, Mandriva...), enter this command in the terminal window:
sudo grub2-mkconfig --output=/boot/grub2/grub.cfg

Some information will print in the terminal window. If it says there were errors, go back to the beginning of Step 2 and try to figure out what you did wrong.

*** Step 3: Reboot your computer ***

- There should be a prominent option on your start menu to shutdown or reboot your computer. You should usually use this, however, if you want to be fancy. you can enter "sudo shutdown -r now" in the terminal window to reboot.

Once you are rebooted, Linux should now be able to access the USB 3.0 ports and will boot much faster as well.
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Reviewed in the United States on August 15, 2013
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Reviewed in the United States on December 16, 2020
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5.0 out of 5 stars Back in Black
Reviewed in the United Kingdom on February 14, 2015
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5.0 out of 5 stars Back in Black
Reviewed in the United Kingdom on February 14, 2015
A fantastic motherboard with great flexibility for overclocking. Currently its running a Phenom II 970 BE which overclocks to a very stable 4.5 Ghz with an Evo 2 heatsink and fan. Due to take ownership of a 9370 chip this week so will see how the motherboard handles the extra wattage being pulled. It has all the connectivity you could need and more, 6 sata 6Gb, 8 usb's (2 of them 3.0) out the back and then another 2 headers for the front (usb 2.0 and 3.0), 1 of the usb's also pulls extra power through so that you can recharge your phones or tablets a bit quicker even with the pc off. All in all its a very nice board and a bargain price on Amazon!
Aesthetically speaking it looks stunning in matt black especially when teamed up with some white [[ASIN:B00J8E91T0 HyperX FURY Series 8GB (2x 4GB) DDR3 1866MHz CL10 DIMM Memory Module Kit - White]] memory sticks that are also a bargain price at the moment!!
All in all, money well spent.
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5.0 out of 5 stars Excellent value, quality little motherboard!
Reviewed in the United Kingdom on September 13, 2016
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Matt BW
3.0 out of 5 stars First one was DOA but rapid replacement is great
Reviewed in the United Kingdom on January 12, 2016
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5.0 out of 5 stars Gigabyte GA-990FXA-UD3 Socket AMD AM3+
Reviewed in the United Kingdom on February 25, 2013
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5.0 out of 5 stars Love it.... best mobo for the money
Reviewed in the United Kingdom on October 3, 2012
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