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Thread: P55A-UD4 - difference between rev. 1.0 and rev. 2.0?




  1. #1
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    Question P55A-UD4 - difference between rev. 1.0 and rev. 2.0?

    As the title says, what is/are the difference(s) between the two revisions of the GA-P55A-UD4?

    The only thing I can see on the Gigabyte website is some hardware USB power switch that's only on the rev. 2.0. (It's software only on the rev. 1.0.)

    Is there anything else I should know?

  2. #2
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    Default Re: P55A-UD4 - difference between rev. 1.0 and rev. 2.0?

    I think the number of powerphases has been increased from 8+1 to 12+1. Other than that it will be very minor changes that won't effect performance. They have also exclusively used Lotes CPU sockets on the 2.0 revision rather than Foxconn ones due to the issues that were experienced at high clocks with sockets burning. Sometimes manufacturers were using tthe Foxconn socket with the Lotes metal CPU retaining clips, but the 2.0 is definitely all Lotes.

    The most common reason for revision is usually a tweaking of components to make the board cheaper to make. There may sometimes be compatibility fixes with regards to RAM or legacy USB support etc.

    In summary, it's always better to seek out the latest revision if you can, but you'll not be disapppointed with a 2.0 version either.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  3. #3
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    Default Re: P55A-UD4 - difference between rev. 1.0 and rev. 2.0?

    The phase design looks the same (12) on both:
    GA-P55A-UD4 (rev. 1.0) - GIGABYTE
    GA-P55A-UD4 (rev. 2.0) - GIGABYTE

    I see there are some slight changes in the layout of some components etc..

    I also think it's better in general to get the latest version, but if it's nothing that affects performance then it doesn't matter.

  4. #4
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    Default Re: P55A-UD4 - difference between rev. 1.0 and rev. 2.0?

    Yes mate you are right. I got confused with the changes between the P55-UDxx and P55A with regards to power phases.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  5. #5
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: P55A-UD4 - difference between rev. 1.0 and rev. 2.0?

    They changed how the phases work, they alternate which is being used, and now when one or more dies the board will still function on the others.

    They also added an official On/Off Charge USB port for things like Iphone, ect.

  6. #6
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    Default Re: P55A-UD4 - difference between rev. 1.0 and rev. 2.0?

    Aha, nice one. Cheers for the info m8. It's good to know, as my "source" has a surplus of version 1.0 boards at a 20% discount.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  7. #7
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    Default Re: P55A-UD4 - difference between rev. 1.0 and rev. 2.0?

    Quote Originally Posted by Lsdmeasap View Post
    They changed how the phases work, they alternate which is being used, and now when one or more dies the board will still function on the others.
    Would you say this also makes it more stable or better for OCing?

  8. #8
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: P55A-UD4 - difference between rev. 1.0 and rev. 2.0?

    I personally prefer the Rev. 1.0 boards as they have more phases, but I have not used a Rev. 2.0 board at all so I can't really say if less phases have any negative effects or not (I doubt it or they wouldn't have designed it like that).

    The Rev. 1.0 boards can also do On/Off charge with the software installed I believe, they just don't have a "Marked" or specific On/Off charge port.

  9. #9
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    Default Re: P55A-UD4 - difference between rev. 1.0 and rev. 2.0?

    I think I'll just stick to the rev. 1.0 then.

    I already have it, but the shop said they can give me a rev. 2.0 instead, when they get it. If it's not significantly better I wouldn't bother (reinstalling everything etc.).

    I tried some OCing and it went ok. I got to 3.8GHz with an i5 750 on stock cooler and stopped there, because I had to raise voltage to 1.225 or so and the temperatures got a bit too hot (90s) with LinX.
    I'm now running it at 3.5GHz and 1.15 V. (until I get a proper cooler, at least)

  10. #10
    Lsdmeasap's Avatar
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    Default Re: P55A-UD4 - difference between rev. 1.0 and rev. 2.0?

    You wouldn't have to reinstall everything, just move everything to the new board is all.

    I mean software-wise anyway, you wouldn't have to reinstall anything, you would however have to reinstall the board into your case if that's what you meant.

    You will be fine with the board you have, no need to update unless you just want to.

    Sounds like you need a good cooler so you can overclock your chip better and keep temps down. That's what I'd be looking for next instead of updating the board.

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