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GIGABYTE P55A-UD4P ATX LGA1156 P55 DDR3 2PCI-E RAID GBLAN CrossFireX SLI USB3.0 SATA3 Motherboard - 1
Actual product may not be exactly as shown.
GIGABYTE P55A-UD4P ATX LGA1156 P55 DDR3 2PCI-E RAID GBLAN CrossFireX SLI USB3.0 SATA3 Motherboard - 46488_l.jpg GIGABYTE P55A-UD4P ATX LGA1156 P55 DDR3 2PCI-E RAID GBLAN CrossFireX SLI USB3.0 SATA3 Motherboard - 46488_1.jpg GIGABYTE P55A-UD4P ATX LGA1156 P55 DDR3 2PCI-E RAID GBLAN CrossFireX SLI USB3.0 SATA3 Motherboard - 46488_2.jpg GIGABYTE P55A-UD4P ATX LGA1156 P55 DDR3 2PCI-E RAID GBLAN CrossFireX SLI USB3.0 SATA3 Motherboard - 46488_3.jpg Customer Photos (0)
Reg. Price: $189.98  CAD
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   Shipping Weight:   5 lbs
   Part #: GA-P55A-UD4P

Features    [ Edit | History ]

Ultra Durable 3 GA-P55A-UD4P Desktop Board, featuring 2 ounces of copper for both the Power and Ground layers which dramatically lowers system temperature by delivering a more efficient spreading of heat from critical areas of the motherboard such as the CPU power zone throughout the entire PCB. GIGABYTE's Ultra Durable 3 also lowers the PCB impedance by 50%, which helps to reduce electrical waste and further lowers component temperatures.

Quick Specs:
Package Contents
  • Ultra Durable 3 GA-P55A-UD4P Desktop Board
  • Driver Disk
  • User Manual
  • Quick Installation Guide
  • 1 x IDE Cable
  • 4 x SATA 3Gb/s Cables
  • 2-Way SLI Bridge Connector
  • I/O Shield
Maximum Memory 16 GB
Form Factor ATX
Processor Supported Core i7 Core i5 Core i3 Pentium
RAID Levels 0 1 5 1+0 JBOD
Total Processor Supported 1
Controller Type Floppy Controller Serial ATA/600 Ultra ATA/133 (ATA-7)
Processor Socket Socket H LGA-1156
Memory Technology DDR3 SDRAM
Processor Technology Enhanced SpeedStep Technology
Memory Standard DDR3-1600/PC3-12800 DDR3-1333/PC3-10600 DDR3-1066/PC3-8500 DDR3-800/PC3-6400
Width 12"
Depth 9.6"
Green Compliant Yes
Green Compliance Certificate/Authority RoHS WEEE
64-bit Processing Yes
Chipset Manufacturer Intel
Chipset Model P55 Express
Number of Memory Slots 4
Number of PCI Slots 2
Audio Channels 7.1
Gigabit Ethernet Yes
Number of IDE Interfaces 1
Number of SATA Interfaces 10
Number of PCI Express x1 Slots 3
RAID Supported Yes
Number of Total Expansion Slots 7
Number of PCI Express x16 Slots 2
Network (RJ-45) Yes
Total Number of USB Ports 10
Number of USB 3.0 Ports 2
Total Number of FireWire/i.LINK Ports 2
PS/2 Port Yes
Number of PS/2 Ports 1
Total Number of Onboard USB Ports 2
Total Number of Onboard FireWire/i.LINK Ports 1
Onboard S/PDIF Header Yes
Total Number of PCI Express Slots 5

Specifications    [ Edit | History ]
     Audio Channels: 7.1
     Sound Controller Manufacturer: Realtek
     Sound Controller Model: ALC889
General Information  
     Brand Name: Gigabyte
     Manufacturer: GIGABYTE Technology, Inc
     Manufacturer Part Number: GA-P55A-UD4P
     Manufacturer Website Address:
     Product Model: GA-P55A-UD4P
     Product Name: Ultra Durable 3 GA-P55A-UD4P Desktop Board
     Product Type: Desktop Motherboard
I/O Controller  
     Controller Type: Floppy Controller
Serial ATA/600
Ultra ATA/133 (ATA-7)
     RAID Levels: 0
     RAID Supported: Yes
I/O Expansions  
     Number of PCI Express x1 Slots: 3
     Number of PCI Express x16 Slots: 2
     Number of PCI Slots: 2
     Number of Total Expansion Slots: 7
     Total Number of PCI Express Slots: 5
     Audio Line In: Yes
     Audio Line Out: Yes
     eSATA: Yes
     Microphone Port: Yes
     Network (RJ-45): Yes
     Number of FireWire/i.LINK 400 Ports: 2
     Number of PS/2 Ports: 1
     Number of S/PDIF Out Ports: 2
     Number of USB 2.0 Ports: 8
     Number of USB 3.0 Ports: 2
     PS/2 Port: Yes
     S/PDIF: Yes
     Total Number of FireWire/i.LINK Ports: 2
     Total Number of USB Ports: 10
     Maximum Memory: 16 GB
     Memory Standard: DDR3-1600/PC3-12800
     Memory Technology: DDR3 SDRAM
     Number of Memory Slots: 4
     Green Compliance Certificate/Authority: RoHS
     Green Compliant: Yes
     Package Contents:
  • Ultra Durable 3 GA-P55A-UD4P Desktop Board
  • Driver Disk
  • User Manual
  • Quick Installation Guide
  • 1 x IDE Cable
  • 4 x SATA 3Gb/s Cables
  • 2-Way SLI Bridge Connector
  • I/O Shield

Network & Communication  
     Gigabit Ethernet: Yes
Onboard Interfaces  
     Number of IDE Interfaces: 1
     Number of SATA Interfaces: 10
     Onboard Audio Header: Yes
     Onboard LEDs Header: Yes
     Onboard S/PDIF Header: Yes
     Total Number of Onboard FireWire/i.LINK Ports: 1
     Total Number of Onboard USB Ports: 2
Physical Characteristics  
     Depth: 9.6" (244 mm)
     Form Factor: ATX
     Width: 12" (305 mm)
Processor & Chipset  
     64-bit Processing: Yes
     Chipset Manufacturer: Intel
     Chipset Model: P55 Express
     Processor Socket: Socket H LGA-1156
     Processor Supported: Core i7
Core i5
Core i3
     Processor Technology: Enhanced SpeedStep Technology
     Total Processor Supported: 1

Gigabyte GA-P55A-UD4P Customer Reviews

Product reviews on are screened for relevance and inappropriate content. Reviews may contain inaccurate information about the product. If there is a discrepancy, please use the Flag this Review link located beside each review. Reviews are not an endorsement expressed by, but opinions from customers based on their own experience with a product. We do not recommend you make purchasing decisions based on facts or opinions expressed regarding Gigabyte GA-P55A-UD4P reviews.
Experience: 9 Months
Stable and VERY OS X friendly
Can't really think of any.
If anyone is considering building a Hackintosh to run Snow Leopard, this board is fabulous for the task. Runs the latest 10.6.5 build of OS X perfectly. Full sound, graphics, network, sleep and even USB 3.0.

I built my i5 750 system with this board specifically for MAC OS X. It has worked without a flaw. All the performance of an iMac at a fraction of the cost.

Highly Recommended.

Experience: 5 Days
 Verified Owner
No problems at all. Worked without any issues whatsoever.
None so far. It is exactly what I wanted.
I did a new system build with this mobo, a i5 760 processor, OCZ 60gig Vertec II drive, 8 gigs of G.Skill ECO ram, 2 GTX 470's in SLI and a Corsair AX 850 PSU. Installed everthing, hit the power button, no issues!
I have never had such an easy build before.
I would recommend this board highly.

Experience: 2 Weeks
 Verified Owner
Extremely stable
You do pay for quality. In this case, one of the most well equipped and stable boards perfect for overclocking. Great board layout, most highly recommended.

abbu b
Experience: 3 Days
There has seem to be a very high level of customers purchasing this board and getting nothing but negative results. I have owned not one not two but three of these boards so far. I must say that every GA-P55A-UD4P board I have owned has never given me any problems with post or instability operation throughout the usage of the board 24/7. I am an A+ Comptia 2008, 2009, and 2010 certified.
I must say that your lucky that you don't have to configure older 1990 - 2000 dip or jumpers on those antique boards. Those types of boards were the nightmare boards to deal with. These newer boards are nothing but easy to work with compared to the older pentium/486 boards. I have seemed to run out of room for instructions to check for installing the motherboard. I support Giga-byte 100%, if anyone needs help or is having problems please email me at and I will help you work out your problems. These are awesome boards with great potential. You should truly understand how a motherboard and cpu operate together before you install one free willing. The Lga 1156 is a tricky socket to work with if you are inexperienced. They must be installed in a perfect way or else you could run into problems that everyone has been complaining about. I have run out of room on the bottom for careful instructions. email me and I will get back to you with your problems. thanks
Here is a checklist for installing this motherboard.
1.) Always use memory that is listed on the motherboards compatibility list.

2.) Make sure always that you are using a full 8 pin +12v connector. This connector is required for full operation of the cpu. Please do not justify thinking a 4 pin would work. A full 8 pin +12v power connector is required for the motherboard to operate. Using a 4 pin could easily cause the motherboard not to post. Make sure cpu fan header is also connected. If not system might not post.

3.) A common problem with socket lga 1156 is that the socket was designed just a tad too small with means the pins are so close together that when you are installing the cpu care must be taken so no pins are touching each other. You must carefully lay the cpu down even and straight right on the pins. The cpu cannot be installed even on the slightest angle. Straight and level on, is the correct

Experience: 1 Days
 Verified Owner
Solid Board, solid brand
Was out of stock
This board was out of stock so I had to switch to the Asus equivalent. Both are solid choices, overclocks well. Not much more to add really, highly recommended to those looking at a i5 processor.

Experience: 2 Days
 Verified Owner
Solid brand, solid build
Architectural limitations
Other than the architectural limitations causing crossfire to slow down when running along side SATA3 and USB 3.0, in which the Asus P7P55DE-PRO has a better workaround design, this is one of best budget boards you can get. No real complaints here, would definitely buy again.

Experience: 2 Weeks
Too many to list, AWESOME MOBO, Looking good on the job
Bios fan names don't always match fan header names, chipset rus hot. IO shield plate is complicated
Beautiful motherboard, good power saving features that still do good with overclocking. Running stable with i7 860 t 3.0 GHZ. 8 gigs ram with 2 sticks. Still cant figure those metal tabs on the i.o sheild

Experience: 2 Weeks
 Verified Owner
+ Supports SATA3
+ Has USB3
+ Lots of ports
+ Supports SLI and CrossFire
- Potential stability issue
First Gigabyte motherboard I own. Not much to comment on so far except the strengths listed above. It supports SATA3 and USB3.

I have some stability issue with the system, but we suspect it to be the video card. Overall, I'm satisfied with this motherboard and plan to go CrossFire 5850 later next year.

Experience: 10 Days
 Verified Owner
Frequent bios updates
Bios doesn't have Core Ratio Offset
This motherboard worked well right out of the box. It stays cool even when overclocked with the Intel Core i7 875K CPU.

Experience: 3 Weeks
 Verified Owner
it work right out of the box, no compatibility issue
Bios fan control could be more flexible
i was a long time Asus user but i was so tired to wait endless bios update  to resolve compatibility issue that i decide to switch to Gigabite and so far im very glad that i did with no issue right out of the boxe.
and they are priced a bit lower then Asus

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Messages about GIGABYTE P55A-UD4P ATX LGA1156 P55 DDR3 2PCI-E RAID GBLAN CrossFireX SLI USB3.0 SATA3 Motherboard

Product No Longer Available (gm0n3y- Nov 29, 10, 2 Replies) Read this message
Support for 1.65 V memory? (TempletonPeck- Nov 10, 10, 2 Replies) Read this message
foxconn or lotes socket? (Jeffrey_T- Nov 10, 10, 4 Replies) Read this message
d: drive dissapearing randomly! (Delavan- Oct 20, 10, 0 Replies) Read this message
4gb installed, only show 2gb in BIOS? (Jason_H- Sep 16, 10, 10 Replies) Read this message
Will my Cpu fit? (Tim_H- Jul 24, 10, 2 Replies) Read this message
iPhone sync issue (Philip_A- Jun 08, 10, 7 Replies) Read this message
Rev 1 or Rev 2? (Chris_M- May 15, 10, 2 Replies) Read this message
Any one running P55A-UD4P with 8Gig of ram ? (Ergo93- Apr 01, 10, 4 Replies) Read this message
Can it run VMware ESXi? (edmidor- Feb 16, 10, 23 Replies) Read this message
will this support the i3-530 LGA1156? (mikeyd- Feb 04, 10, 1 Replies) Read this message
RAID 0 as boot drive on Gigabyte P55A-UD4P? (edmidor- Jan 27, 10, 1 Replies) Read this message
Does the Gigabyte GA-P55A-UD4P support VT-d? (Virtual H- Jan 20, 10, 1 Replies) Read this message
5850 Clearance (Bruce_W- Jan 09, 10, 1 Replies) Read this message

Post a New Message  |    All Messages       Browse NCIX Forums

Forum messages are not reviewed and may not contain accurate information about a product. Message contents are opinions from customers based on their own experience with a product. We do not recommend you make puchasing decisions based on Forum messages.
Reviews from the Web

Below are reviews found on other web sites for this product submitted by customers.

Comment: Article clarifies the controversy about USB3, SATA 6gb and SLI/Crossfire on this mobo
Posted by: edmidor @01/27/10
Submit a review link   |   Latest 30 reviews
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First 30 days limited warranty through The remainder of the 3 year warranty is provided directly by the manufacturer.

Currently Gigabyte accepts end users’ requests on RMA service.
Motherboards, Video cards, servers and Rackmount server boards carry three years limited warranty.

Warranty Effective On Date of Manufacture

Gigabyte determines warranty based on the manufacture date. The manufacture date can be verified by the serial number found on the product. The first four digits after "SN" determine the year and week of manufacturing date. For example:

"01)04719331729028(21) SN0213030585" represents the 13th week of 2002

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    (Replacements will be for the exact or equivalent product)
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  • RMA numbers will be valid for 30 days after issued date
  • Gigabyte will provide one way freight via UPS or FedEx ground free of charge
  • For consecutive violation for No Trouble Found (NTF), a testing fee per NTF board or system may apply.

Warranty Period by Product

  • Motherboards
    • All motherboards carry a 3 year limited warranty (First 2 years parts & labor, 3rd year parts only)
  • Graphic Accelerator Cards (VGA)
    • All graphic cards carry a 3 year limited warranty (First 2 years parts & labor, 3rd year parts only)
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    • Server Boards carry a 3 years limited warranty (First 2 years parts & labor, 3rd year labor only)   
    • Rackmount server boards carry a 3 year limited warranty (First 2 years parts and labor, 3rd year labor only)
    • Rackmount components carry a 2 year limited warranty
  • PC Barebones System
    • Motherboards assembled with barebones systems carry a 3 years limited warranty (1st year parts & labor, 2nd and 3rd year labor only)
      * Gigabyte shall provide the fees/charges for parts upon testing of motherboards in their 2nd and 3rd year of warranty
  • Peripherals (Coolers, Keyboards, Mouse, Optical Devices, etc.)
    • All peripherals carry a 1 year limited warranty
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    • All notebooks carry a 1 year limited warranty
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    • All wireless and networking products carry a 1 year limited warranty

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