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Gigabyte GA-P55A-UD6 and GA-P55A-UD4P Review



At this time you should be wondering if either of these boards is worth purchasing. The answer is yes, both of these boards would work extraordinarily well in any P55 system. However, you won't be able to decide which board is better simply by how well they perform in benchmarks. Why? Because just about every motherboard performed exactly the same. You'll need to decide what board fits you best by comparing it's features, specifications, an how well it will overclock for you.

We saw that both of these boards are full of great specifications and features. Both boards are capable of USB 3.0, SATA 3.0, and USB Power 3.0. They also both use 2-oz copper PCBs, and were built with the Ultra Durable 3 design.  In fact, the boards are almost identical. One of the main differences is the Phase Power for each board. The P55A-UD4P uses 12 phase power, while the P55A-UD6 uses 24 phase. Another difference between the boards is the PCIe and memory slots. The UD6 has 3 PCIe slots and six DDR3 Dimm slots, while the UD4P utilizes only two PCIe slots and four DDR3 Dimm slots. This tells us that the UD6 is aimed at the slightly higher end user. That's not to say it doesn't have it's quirks! I found putting my DIMMs in the 3rd and 6th slot rather strange.

As far as overclocking goes both boards were great at it. Both boards were able to bring my i5 750 above 4GHz, and the dual BIOS greatly aided in this conquest. I was very surprised to see the P55A-UD4P actually overclock higher then the UD6. Not only that, but a full 200MHz higher. When the boards were overclocked, we saw some pretty big performance increases, which is always good.

In the end, I'd reccomend these boards to anyone who wants to spend the money. That being said, unless you want to use three videocards, you may he happier with the UD4P. It's slightly cheaper, overclocks a little bit better, and offer you more then you need!


Gigabyte GA P55A-UD4P


  • Great Overclocker
  • USB 3.0
  • SATA 3.0
  • USB Power 3.0
  • 2-oz Copper PCB
  • 12 Phase Power



  • No Clear CMOS Button
  • No Onboard Power/Reset Switch


Gigabyte GA P55A-UD6


  • Great Overclocker
  • USB 3.0
  • SATA 3.0
  • USB Power 3.0
  • 2-oz Copper PCB
  • 24 Phase Power
  • Three PCIe X 16 slots
  • Six DDR3 DIMM slots



  • Didn't overclock as well as the UD4P
  • It's a little weird putting the memory in the 3rd and 6th slots


OCC Gold

  1. Introduction & Closer Look
  2. Closer Look (P55A-UD4P)
  3. Closer Look (P55A-UD6)
  4. Closer Look (Drivers & Programs)
  5. Closer Look (The Bios)
  6. Closer Look (The Bios Continued)
  7. Specifications & Features
  8. Testing (Setup & Overclocking)
  9. Testing: Apophysis, Win RAR
  10. Testing: Office 2007, POV Ray, PcMark Vantage
  11. Testing: SiSoft Sandra 2009
  12. Testing: Sciencemark 2.0, Cinebench 10, HDTune 2.55
  13. Testing: Far Cry 2
  14. Testing: Crysis Warhead
  15. Testing: BioShock
  16. Testing: Call Of Duty World at War
  17. Testing: Dead Space
  18. Testing: Warhammer 40,000: Dawn of War II
  19. Testing: Left 4 Dead
  20. Testing: 3DMark 06 Professional
  21. Testing: 3DMark Vantage
  22. Conclusion
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