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Thread: P55-UD4P help




  1. #1
    Join Date
    Oct 2009
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    Ca
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    Default P55-UD4P help

    working on my new system i5 750 with a p55-ud4p and gskills 1600 DDR3 ram

    Whats the best why to setup the mobo bios for this setup ?

    i am having problem getting the memory @ 1600 or 1333 for that madder and turbo on @ the same time.

    I tryed setting the bclk to 20 ratio to 133

    setting the ram to 7-7-7-24 but when i go in CPU-Z it shows my CPU @ 133x24

    it was 133x9 and would go up to 133x20 now sits @ 133x24

    any help would be grate thanks

  2. #2
    Join Date
    Nov 2007
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    Default Re: P55-UD4P help

    which G.skill DDR3 1600 r u using? the Ripjaws?

    if so, you ened to reduce the multipler to 18 and set the BCLK to 160, remember back in S775 days the FSB? Here the BCLK determines the RAM speed beyond 1333mhz since 1333 is the max rated speed that core I5 can support except through overclocking.

    There SHOULD be an XMP setting in ur bios, u need to set it so XMP profile is activated otherwise the RAM wont run at its rated settings.

    133x9 = intel Speed step kicking in
    133x20 = turbo boost of 2 bins, i.e 2.66+266mhz
    Asrock P55-Extreme
    Core I5 @ 3.2GHZ
    2x2GB G.skill Ripjaws DDR3 1600
    ASUS HD5850
    1TB Samsung SATA II
    Corsair TX650W PSU

  3. #3
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    Default Re: P55-UD4P help

    ok thanks i will try that.

    but i thought that the turbo was 3.2 ?

    and yes the ripjaws

  4. #4
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    Default Re: P55-UD4P help

    ye, well it depends on the BCLK on how much turboboost will increase your cpu speed...

    For you, since ur running on a 133BCLK, the multiplier can be raised to a maximum of 24, which is 3.2ghz, (24x133 = ~3200).

    But in my case, to run my ripjaws @ 1600, i need to raise my BCLK to 160 but reduce my multiplier to 18 so that my CPU doesnt run too fast (decrease heat output).

    It is really upto u whether u want to play around with the multiplier or not, u can leave it at 20x, but then ur cpu will be running overclocked most of the time. for me 160x18 = 2.9 ghz already. When u take into account turbo boost, it can increase multiplier upto 4 times, so 160x4 = 640 + 3200 =~3.8ghz when running turbo boost at 24 multipler
    Asrock P55-Extreme
    Core I5 @ 3.2GHZ
    2x2GB G.skill Ripjaws DDR3 1600
    ASUS HD5850
    1TB Samsung SATA II
    Corsair TX650W PSU

  5. #5
    Join Date
    Oct 2009
    Location
    Ca
    Posts
    11

    Default Re: P55-UD4P help

    I see what your saying but my problem is i dont see turbo boost kick in.

    If i run 1 thread prime95 or 4 thread it still only goes up to 133x18
    or 9x133

    with my old bios f3 idle was 1.2 and on 1 thread it went up to 3.2 on 4 thread it went up to 2.8 ghz not seeing that with the new bios

    what you said 133x18 i did my rams @ 6-7-7-24 now but the CPU will only kick in to 2.4 ghz

    any clue or iam i really missing something ? :)

    in core temp i see it @ 133x9 and jumps to 133x18 in cpu-z i dont see it @ 133x9 only 133x18

  6. #6
    Join Date
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    Default Re: P55-UD4P help

    U need to change the CPU BCLK (base clock) to 160mhz, and set the RAM to XMP mode, i.e DDR3 1600 profile, once that is set, make sure the CPU BCLK is set at 160mhz and adjust the multiplier according to your needs.

    Prob in core temp, it doesnt take into account intel speedstep, it just gets what ever multipler is set in the bios and the curent Bclk.
    Asrock P55-Extreme
    Core I5 @ 3.2GHZ
    2x2GB G.skill Ripjaws DDR3 1600
    ASUS HD5850
    1TB Samsung SATA II
    Corsair TX650W PSU

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