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Item#: N82E16813128417

GIGABYTE GA-P55A-UD3P LGA 1156 Intel P55 SATA 6Gb/s USB 3.0 ATX Intel Motherboard

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  • Intel P55
  • Core i7 (LGA1156)/i5 (LGA1156)
  • DDR3 2200/1333/1066/800

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Supporting the latest Intel Core i7 and Core i5 processors for the LGA 1156 socket, the Gigabyte GA-P55A-UD3P motherboard sets a new standard in high performance computing. With the memory controller integrated directly into the processor die, the motherboard supports dual channel DDR3 memory for blazing fast memory performance up to 2200MHz and above.

The Gigabyte GA-P55A-UD3P motherboard was designed to offer a stable, high-speed platform for delivering amazingly fast data transfer via the Gigabyte 333 onboard acceleration technologies. Featuring the USB 3.0 host controller uPD720200 from NEC Electronics, the GA-P55A-UD3P allows users to take advantage of super fast USB transfer rates of up to 5Gbps, delivering 10x faster data transfer compared to USB 2.0. And thanks to the Marvell SE9128 controller, the industry’s first Serial ATA Revision 3.0 solution, the GA-P55A-UD3P motherboard offers support for next generation high speed data storage devices with data transfer speeds of up to 6Gbps.

The Gigabyte GA-P55A-UD3P motherboard promises to provide the stability, reliability and longevity essential to meet the power needs of high-end processors and other components running today's most demanding applications and games.

  • newegg Intel P55 Express Chipset for Intel LGA 1156 CPU Based on the Intel P55 Express chipset, the Gigabyte GA-P55A-UD3P supports Intel's latest LGA 1156 processors including the Intel Core i7 and Core i5 processors.
  • newegg Ultra Durable 3 Technology The Gigabyte GA-P55A-UD3P features revolutionary Ultra Durable 3 technology with a 2oz copper PCB design to help reduce system temperature and dramatically enhance performance.
  • newegg Gigabyte 333 Onboard Acceleration The Gigabyte GA-P55A-UD3P delivers all the killer next generation features that gaming enthusiasts and power users have been waiting for by incorporating Gigabyte's 333 Onboard Acceleration features with support for USB 3.0, Serial-ATA Revision 3.0 (6Gbps) and a 3x USB Power Boost.
  • newegg ATi CrossFireX Multi-GPU Technology Support ATi CrossFireX is the ultimate multi-GPU performance gaming platform, enabling two or more discrete graphics processors to work together for boosted system performance and a breakthrough gaming experience.
  • newegg DDR3 2200 Support Four 240-pin DIMM sockets support up to 16GB of non-ECC DDR3 memory at speeds of up to 2200MHz, ensuring ample capacity for any application.
  • newegg Gigabyte DualBIOS Gigabyte DualBIOS technology protects the BIOS from virus attacks. With its innovative backup BIOS design, this platform provides twice the security thus assuring the PC’s stability.

Learn more about the GIGABYTE GA-P55A-UD3P

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Customer Reviews of the GIGABYTE GA-P55A-UD3P

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  • Amanda G.
  • 9/30/2010 4:00:38 PM
  • Ownership: 1 day to 1 week

4 out of 5 eggshmm rating good but doa board

Pros: board is layed out well with sata ports upward facing, is sata 6gbps/ for the price it's really layed out well

Cons: I bought the open box so I can not give it a bad rating but it was doa. either it came back doa or the guy swapped boards./ wouldn't even post just dead
only other cons i saw was no 1394/ and only a few power connectors. if you have splitters and like fans then you are fine if you like fans and don't have them you are in trouble but for the price it's not bad

Other Thoughts: I rma'd this one and am tryig the p55 ud4 series. this is my 1st experience with gigabyte and wanted to give them a real try as I build at least 15 systems a year and even if doa it doesn't change what a board can be

Did you find this review helpful? Yes No

  • Eric S.
  • 9/12/2010 9:55:22 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsGood mobo

Pros: Very good motherboard with plenty of room for all your needs.

Cons: The back panel has only one P/S2 connector, which is a neglect towards anyone who has P/S2 devices only. They could have fit 2 less USB port to have a second P/S2... or give an adapter in the mobo box.

Other Thoughts: none

Did you find this review helpful? Yes No

  • Edward H.
  • 8/29/2010 4:35:18 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsI'm going to buy another

Pros: Easy board to use. Easy to OC. I've had my BCLK up to 230MHz. The i7 860 is not stable there, of course, so I'm running it at 182x22=4004MHz, rock stable with Vcore=1.3125v so my cooling keeps everything in the 70's Centigrade at max load. The 12-phase VRM seems to help keep it stable. Auto voltages are fine - Vcore never goes over 1.396v (Intel calls for relative max of 1.4v), but it gets too hot on load - not the mb's fault.

How can I set the multiplier to 22x? Set Turbo Boost to Auto. Actually, the mb did that itself when I set the multiplier to 22x. Smart board.

I've had my RAM up to 2000MHz without issues. You need to do the settings manually in BIOS for best results, but using Auto often gives fine results.

ET6 is a fine utility. I can monitor temps, fan speeds, voltages, clocks, everything.

MB has no problem with SSD.

In the PC Health part of the BIOS you can enable Smart Fan, and set it to voltage control or PWM control.

When you mess up, the mb rescues you. I

Cons: Well, they had to do something to make you want to buy the 4-series. So most of the SATA sockets stick up rather than back.

I am unhappy that Gigabyte is selling only this board with its "Fritz Chip" (TPM) here in the US, and is not making the -UD3R available. But TPM has to be enabled to work, so you can let the sleeping dog lie.

Other Thoughts: Had this board six months. Ran many fan testing sessions on it.

The best way to update the BIOS is to download it, then use the @BIOS utility to install from file. Make sure you uncheck "Load CMOS default after update" box or you will have to re-do your settings.

AHCI driver works fine for SATA. Do a web search on switching to AHCI from IDE. I went through the process no sweat. You need AHCI for the Trim command for SSD's.

SYS_FAN2 header auto-controls fan(s) based on the PCH temperature - as if that ever gets hot - so it's always low.


i7 860 at 4004MHz, Vcore=1.3125v, HT and LLC enabled.
4GB Ripjaws DDR3-2000, 9-9-9-28 @ 1820MHz
Noctua NH-D14 with 1 NF-P14 and 2 Gentle Typhoon AP-14's
NZXT Beta Evo (modded) with 4 fans
Kingston V+ 64GB SSD (don't get this)
Barracuda 7200.12 1 TB

The board is physically strong, holds up well with a heavy heatsink and three heavy fans.

I'm getting another one of these.

4 out of 4 people found this review helpful. Did you? Yes No

  • Richard B.
  • 6/27/2010 1:35:46 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsGigabyte gets better and better

Pros: Vertically oriented SATA headers repositioned to accommodate double wide GPU, native USB 3.0 and SATA3, repositioned front panel header for easier connection, two styles of internal SATA cables (2 with L-end, 2 with straight ends), perfect alignment with rear I/O plate, perfect alignment with mounting posts (Lian Li case), more space between CPU heat sink/fan and GPU for better ventilation, significantly more BIOS options, somewhat more helpful descriptions within CMOS setup menu, improved Gigabyte website hosting latest drivers and BIOS version.

Cons: Parallel and serial headers are obsolete and usurp valuable board space. You cannot use a floppy disk to flash the BIOS, because these boards use a 2048K BIOS which exceeds the capacity of a floppy disk. However the FDD header is still important for those who wish to install 64-bit XP Professional. Confusing proliferation of SATA drivers hosted on the Gigabyte support website, shallow to no documentation describing their application. The installation CD didn't work at all, so I simply downloaded the latest drivers from the Gigabyte support site. Board ships with the F5 BIOS, but the latest non-beta BIOS is F10. Beware the F11a (beta) BIOS which fried my previous board, unable to get beyond the BIOS splash screen despite clearing CMOS. One burned, twice cautious - I'll not reflash with beta versions.

Other Thoughts: Booted first attempt, totally stable, easy to configure. Gigabyte tech support sent me RMA for my previous board within hours of my online application. Purchaser should have some prior experience configuring these boards before attempting the project, due to the complexity of the CMOS setup. Memory should be manually configured, affirmatively setting voltage and clock cycle latencies according to manufacturer's recommendations. The SPD information is notoriously inaccurate, and will cause instability if memory configuration set to 'auto'. USB 3.0 is fantastic - 16GB image backup to external HDD in <3 minutes. Internal SATA3 likewise awesomely fast, data transfers between internal drives in notime flat. I love this board, the best yet from Gigabyte.

5 out of 5 people found this review helpful. Did you? Yes No

  • James I.
  • 6/25/2010 11:25:41 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsNot so good

Pros: Great lookin mobo with great overclocking bios features, but beware of...xmp profile may be required !

I had stop errors during the O/S install. A real hassle for 2 days until I discovered that memory above 1333 evidentally won't function. It didn't like my Gskill DDR3-1600. I finally discovered that you must first enable the xmp memory profile in bios.

Now that I'm past all that, I've discovered that they have a bios F6 which addresses the xmp problem.

Cons: Only one PS/2 connection. Not good, but I figured I would use that for the keyboard and just use an adapter for my mouse. The adapter don't work and I tried 3 of them; although the USB is supposed to be backwards compatable. The manual says backward to usb 1.1 and 2, but it doesn't work.

I find no bios setting for legacy usb or any other setting to make it work. The PS/2 connection is mandatory for me since I run an 8port-PS/2-KVM switch.

Other Thoughts: I've been an avid Gigabyte fan for years. In fact, I'm currently running 6 gigabyte systems. This ps/2 problem causes me to eat shipping plus re-stocking charges and this only available Gigabyte P55 chipset configuration forces me to seek out another brand.

1 out of 4 people found this review helpful. Did you? Yes No

  • Gary L.
  • 6/22/2010 12:49:06 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsSmooth Build

Pros: Everything assembled easily for one of my easier builds.
All items are top quality..
Glad i bought the better power of this board!

Cons: Would've prefered Floppy connector change spots with IDE connector.
Most people use 3 1/2 " floppy to flash BIOS, while performance buyers don't use IDE drives!

Other Thoughts: Antec 900
Gigabyte P55A UD3P
OCZ 550 watt Fatility
4 gig GSkill RipJaws 1600
Intel I-7 860
WD 640 Gig SATA 6 gb/s drive

0 out of 1 people found this review helpful. Did you? Yes No

  • Nicolas S.
  • 5/31/2010 7:01:42 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsI cannot tell you how much I love this board

Pros: Where to start? USB 3.0, SATA 3.0, fast bridge speeds, sweet BIOS (comes with useful tools such as SMART LAN, has a nice BIOS flashing utility, and a neat splash screen on system start up), has ample card, ram, and USB slots, and although esoteric, comes with a useful set of utilities for advanced users (e.g. SMART6)
(Homer Simpson drool)

Cons: Lost onboard LAN about a week in. Window 7 saw the drivers fine, and they were up to date. Problem was quickly fixed by flashing the BIOS with the most recent version using the simple Q-Flash utility.

Other Thoughts: You will not be disappointed with this board

1 out of 1 people found this review helpful. Did you? Yes No

  • James S.
  • 5/4/2010 10:08:08 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsSo far, so good!

Pros: Excellent feature set and build quality at a good price (especially at newegg!) Win 7 is currently running great on an i7 860 with 8 GB of RAM.

Cons: The back plate that covers the ps2/usb/lan ports on the back of the case is very cheap and flimsy, especially when compared to the board itself and included cables. Not a huge deal and I guess fairly typical so I didn't dock any eggs.

Other Thoughts: Had to disable the gRaid controller and the floppy drive prior to installing Windows 7 (64-bit ultimate). Before doing this I waited ~40 minutes and the windows install didn't even make it to the point where it was ready to copy files to the system.

After doing so the install completed in ~20 mins so all was well. Apparently quite a few motherboards have similar issues.

0 out of 1 people found this review helpful. Did you? Yes No

  • Anonymous
  • 3/5/2010 12:44:17 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsGood Board

Pros: Nice size and apparent build quality. Smart TPM. Decent automatic overclocking software. No regrets.

Cons: Probably don't need to pay for USB 3.0 at this point as hardware can't keep up with USB 2.0. Not a lot of documentation detailing how the functions work (took me a few days to get the TPM working because it drops the certificate in a folder called "temp" which I accidentally deleted). Some features are obsolete now as Windows 7 picks this up (power saving program).

Other Thoughts: Intel Core i7-860, 1156, 2.8GHz (running at 3.1GHz)
Gigabyte GA-P55A-UD3P 1156 motherboard
G.SKILL Ripjaw 4GB DDR3 1600 F3-12800CL7D-4GBRH (running at 1680MHz at 7-7-7-24, 1.6V)
Gigabyte GT240 1GB GPU GV-N240D3-1GI
Cooler Master N520 CPU cooler
600W Ultra power supply
WD and Seagate drives
Windows 7 Home Premium

1 out of 4 people found this review helpful. Did you? Yes No

  • Anonymous
  • 2/27/2010 7:16:08 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsOnly 1 issue ...

Pros: Solid power, great features, easy layout and build, all the BIOS toys I could want. Just works. i860, 8GB ripjaws 1600, 2 x XFX HD-467X-ZDF2 Radeon HD 4670 1GB, Intel 80GB G2 SSD, Noctua NH-C12P, Corsair HX-850

Cons: BIOS bug prevents ACHI and working DVD/CD drive to be together. That's worth -1 egg, especially since it seems to be reported on the web as a characteristic of Gigabyte boards.

Other Thoughts: I love the board, and the system is quick. Too bad about the ACHI issue.

7 out of 7 people found this review helpful. Did you? Yes No

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Item#: N82E16813128417
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