Gigabyte GA-P55A-UD6 USB-3 SATA-6G Motherboard E-mail
Reviews - Featured Reviews: Motherboards
Written by Olin Coles   
Thursday, 24 December 2009
Table of Contents: Page Index
Gigabyte GA-P55A-UD6 USB-3 SATA-6G Motherboard
Intel Lynnfield LGA1156
Intel P55 Express Platform
Gigabyte P55A Features
Smart TPM Security Encryption
GA-P55A-UD6 Specifications
First Look: GA-P55A-UD6
Closer Look: Gigabyte P55A
Motherboard Testing Methodology
Gigabyte P55A-UD6 vs P55-UD6
EVEREST CPU Benchmarks
PCMark05 System Tests
Passmark PerformanceTest
Maxon CINEBENCH Results
Crysis Benchmark Results
Far Cry 2 Benchmark
Power Consumption Results
Intel P55/LGA1156 Final Thoughts
Gigabyte GA-P55A-UD6 Conclusion

Intel P55 Express Platform

The Gigabyte P55 and P55A-series motherboard platform is designed for the Intel Core i5/i7 LGA1156 'Lynnfield' processor (CPU) and Intel P55 Express Chipset (IOH). New to the P55 platform is a Direct Media Interface (DMI) that connects between the processor and chipset. This replaces the Quick Path Interconnect (QPI) that is used between the X58 and the i7 CPU. The chipset supports 8 PCI Express 1.1 x1 Ports (2.5GT/s) for flexible device support. The chipset also supports 6 SATA 3Gb/s Ports with Intel Matrix Storage Technology providing RAID levels 0/1/5/10. Up to 14 USB 2.0 Ports can be supported with the chipset's integrated USB 2.0 Rate Matching Hub, along with Intel High Definition Audio for premium digital sound.

The Lynnfield CPU incorporates the system memory controller (as it did beginning with Nehalem) and accesses DDR3 memory through two independent memory channels. Dual graphics cards are also supported directly from the CPU, in a "1x16" or "2x8" configuration. The IOH connects to the CPU via the Direct Media Interface (DMI) bus, and allows only 2 GB/s bandwidth. The P55 chip then provides support for the SATA, USB and other system interfaces that are normally handled by the ICHxx Southbridge chip on most other Intel boards.


All motherboard busses and components are driven from a single 133.33 MHz base clock. The resulting component speed values are generated by applying a multiplier value to this base clock. There are four multipliers on the motherboard which are used to set the system speed:

  1. CPU Speed: When multiplied by the system base clock speed (default 133.33 MHz) gives the CPU frequency. Four multipliers are used to define different speeds based on the number of active CPU cores.
  2. Memory Speed: When multiplied by the system base clock speed gives the memory frequency. For example a memory multiplier of 10 times the base clock of 133.33 MHz results in a memory frequency of 1333 MHz.
  3. Quick Path Interconnect (QPI) Speed: Selectable transfer rate of data transferred between the CPU and the IOH.
  4. Uncore Speed: This multiplier applies to the non-CPU related items in the processor. The limit on this multiplier is set by the memory multiplier.

Intel P55 Express Chipset Features

Intel Management Engine Ignition Firmware Support
Provides essential platform functionality such as clock maintenance and thermal reporting
Intel Matrix Storage Technology
With additional hard drives added, provides quicker access to digital photo, video and data files with RAID 0, 5, and 10, and greater data protection against a hard disk drive failure with RAID 1, 5, and 10. Support for external SATA (eSATA) enables the full SATA interface speed outside the chassis, up to 3 Gb/s.
Intel Rapid Recover Technology
Intel's latest data protection technology provides a recovery point that can be used to quickly recover a system should a hard drive fail or if there is data corruption. The clone can also be mounted as a read-only volume to allow a user to recover individual files.
Intel High Definition Audio
Integrated audio support enables premium digital surround sound and delivers advanced features such as multiple audio streams and jack re-tasking.
Universal Serial Bus (USB)
Hi-Speed USB 2.0, provides greater enhancement in performance with a design data rate of up to 480 megabits per second (Mbps) with up to 14 USB 2.0 Ports.
USB 2.0 rate matching hub
Enables lower power requirements and manages the transition of the communication data rate from the high speed of the host controller to the lower speed of USB full speed /low speed devices.
Serial ATA (SATA) 3 Gb/s
High-speed storage interface supports faster transfer rate for improved data access with up to 6 SATA ports.
SATA interface designed for use with external SATA devices. It provides a link for 3 Gb/s data speeds to eliminate bottlenecks found with current external storage solutions.
SATA port disable
Enables individual SATA ports to be enabled or disabled as needed. This feature provides added protection of data by preventing malicious removal or insertion of data through SATA ports. Especially targeted for eSATA ports.
PCI Express 2.0 interface
Offers up to 2.5GT/s for fast access to peripheral devices and networking with up to 8 PCI Express 2.0 x1 ports, configurable as x2 and x4 depending on motherboard designs.
USB port disable
Enables individual USB ports to be enabled or disabled as needed. This feature provides added protection of data by preventing malicious removal or insertion of data through USB ports.
Intel integrated 10/100/1000 MAC
Support for the Intel 82578DC Gigabit Network Connection
Green technology
Manufactured with lead-free and halogen-free component packages



# allantonyananth 2010-04-12 11:43
thank you sir
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# RE: Gigabyte GA-P55A-UD6 USB-3 SATA-6G Motherboardrohit 2010-04-13 00:21
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# RE: Gigabyte GA-P55A-UD6 USB-3 SATA-6G MotherboardRuzveh 2010-08-30 18:57
Well the test lacks temperature testing section. Who will test the temperature here? And are you sure that the low power consumption is because of 24phase power design and not 12?
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# RE: RE: Gigabyte GA-P55A-UD6 USB-3 SATA-6G MotherboardOlin Coles 2010-08-30 19:27
Dear unappreciative visitor: your negative remarks and obvious sense of entitlement are not welcome here. Your comment lacks any useful detail on how a conclusive temperature test should be conducted (by your expert measure) and you've managed to disregard all of the other information delivered in this article.

Since you asked "Who will test the temperature here?", my answer is YOU. Why don't you go spend the time testing the hardware, controlling the environment, and publishing the results to the public.
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