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Power Consumption

This test should be very straight forward. As we have seen in previous reviews, less complex boards tend to use less power. As the GA-990FXA-UD3 has fewer PCIe slots and some differences in is power design. I expect it to come in just behind the more complex 990FXA-UD5.

As expected, the GA-990FXA-UD3 uses less power than its bigger brother the GA-990FXA-UD5. At idle I see a difference of about 6 watts with power use being 93.6 and 99.6 watts respectively. At my tested maximum load for the system I saw a difference of 22.6 watts with the power us being 312.6 and 335 respectively.

Final Thoughts

The GIGABYTE GA-990FXA-UD3 is the line between high performance and your average motherboard. Many boards I have owned or tested with a price tag below the $154.99 price of the UD3 just fall short in some way. It is often due to lack of feature, lack of support for certain technologies such as CrossfireX and SLI, and some just struggle with usability. I didn't really have any issues using the UD3 and getting in and out of the traditional BIOS was a breeze. Its POST failure recovery and dual BIOS helped me to avoid a few bad boots during the BIOS update and during overclocking.

While the board was doing its job well, keeping itself from sitting at a black screen and preventing user error, thanks to the excellent Dual BIOS, it was not being very friendly about overclocking. It seemed like it was fighting me on it at every turn. There were differences in both the BIOS and in Windows voltages registering huge fluctuations in peak voltage for the CPU. The further up I pushed the CPU voltage, the more unstable it seemed to be. But until this instability limit was reached, it would run like a dream. There is definitely a strong line between stable and not stable here.

While I do believe the GA-990FXA-UD3 is about $10 too expensive compared to competing boards, and I felt overclocking was a bit limited, there is nothing else I can complain about with this motherboard. It supports every feature GIGABYTE offers short of the unique features on the G1.Killer series. It has a beautiful all black color scheme with white and gun metal grey trim. I use the 990FXA-UD5 as my personal system's motherboard and I didn't have to give up one single feature or connectivity option when switching to this board for testing.

If you do plan on doing more serious overclocking and/or use three GPUs, you will want to spend the extra $25 on a UD5. If you never plan to use more than two graphics cards and/or don't overclock your CPU very far, then you can use that $25 on a dedicated audio card or try upgrading another part of your system. If you are after CrossfireX or SLI support then the GA-990FXA-UD3 $154.99 price tag is within your budget, then there is no reason to try to save any more on lesser 990X series boards. The extra features should ensure you get your money's worth.


  • Strong SATA I/O Performance
  • Great Color Scheme
  • All of GIGABYTE's Premium Features in a lower price point
  • Plenty of Expansion Slots and Connectivity


  • SATA I/O Sequential Read/Write performance a little low
  • Overclocking Limited by Voltage Regulation
  • Priced a little higher than competitors

Overall Score: 8.75 / 10.0

Help Us Improve Our Reviews By Leaving a Comment Below!

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    Thank you for your review of this board. Most reviewers have focused on the UD5 and UD7 models.  I am lucky to have a Tiger Direct/Comp USA store nearby. I had to choose between the UD3 and the ASUS Sabertooth 990 FX. I chose the UD3 because it had the features I was looking for and was nearly forty dollars cheaper and had an aggregate review on Newegg of 80% (four eggs and up). My build is intended for a multi monitor set up with a heavy emphasis on Photoshop and some reasonably stout gaming, so the dual X16 slots made the sale.
      Cash flow has caused this to be a slow build and during this time I have been wandering the net looking for anyone who has bothered to take the time to feel this particular board out. Your review has reinforced  that this is the perfect board for me.
     My eventual specs will be:
    FX 8150 8 core CPU
    Kingston Hyper-X  1600 mhz (16 gigs)
    Kingston Hyper-X SSD (120 gig)
    3 -2 TB Western digital Caviar green drives
    2 EVGA (or MSI) GTX 560 Ti’s @ 2 GB memory each.
    1 Blu-Ray reader/Burner
       Again, thanks for the review. It was much appreciated.

  • Avro Arrow

    I use it and it runs like a dream.  Keep in mind, as with most AM3+ AMD 900 series chipset motherboards that you have to flash the BIOS to the newest non-beta version on Gigabyte's website in order for it to support Bulldozer/Piledriver CPUs.  I did the BIOS flash and I'm good to go.  😀

  • Simonmarley

     can for the life of me get  sli to run on the ud3 motherboard how can i turn it on ?

  • nate

    you forgot to put what kind of Ram you used, as that can have a major effect on overclocking as well

  • wendy

    can I use a pce-i 2.0 for this motherboard?

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