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Unable to boot at 2133MHz on GA-P67A-UD3-B3 (stuck at 1600MHz)

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  • Unable to boot at 2133MHz on GA-P67A-UD3-B3 (stuck at 1600MHz)

    MB: Gigabyte GA-P67A-UD3-B3 (updated at bios F9)
    CPU: i5 2500K
    RAM: G.Skill F3-2133C10D-16GAB ARES (8GBx2)

    I just bought some new RAM and after installing it I noticed it ran at 1333 MHz. So I read up online and turned on XMB from the BIOS to set it at 2133, but the system didn't boot and kept loading the previous settings saying it has "experienced boot failures because of overclocking or changes of voltages". What's the issue exactly?

    Now, after a lot of fiddling I managed to boot it at 2133, but since I'm not completely sure if everything's alright (it probably isn't) I'll just show how it is when running at 1600 first and then what I did to make it run at 2133.

    So, first of all, the sticker:
    http://abload.de/img/1nergt.jpg

    CPU-z and Aida64:
    http://abload.de/img/2w0plf.jpg
    http://abload.de/img/3djone.jpg

    http://abload.de/img/4cvrz7.jpg

    The BIOS when running at 1600:
    http://abload.de/img/5r7r09.jpg
    http://abload.de/img/6m2r8w.jpg
    http://abload.de/img/7e5ptu.jpg
    http://abload.de/img/8gfqcy.jpg
    http://abload.de/img/9tjpvg.jpg

    XMP Profile 1:
    http://abload.de/img/109erth.jpg (it says 1867 so I assume it's not the right one?)
    http://abload.de/img/1181pcb.jpg

    XMP Profile 2:
    http://abload.de/img/12far1n.jpg
    http://abload.de/img/13t7qur.jpg

    As I said earlier, after a lot of trial and error I managed to boot it at 2133 (it said 2134 in the task manager, iirc). I changed the voltage to 1.600V, put it on XMP Profile 2, SPD at 2133, DRAM Timing Selectable (it's "auto"/"quick"/"extreme") on "quick" and changed the channel A timing settings (do I only have to change channel A btw? CPU-z shows that I installed the ram on slot #2 and #4, is that what it is?) to this:

    http://abload.de/img/14ubq2v.jpg

    Now, I tried to put the same values that Aida showed on this profile but not all acronyms were present so some of them might be completely off (I did a bit of searching on what to put there but didn't find anything concrete) so I need some help here, if this is the way to do it to begin with, that is.

    Sorry for all the links but I couldn't include all those pics in a single post.

  • #2
    Performance Enhance- Standard

    All timings look good except tRFC.

    DRAM Timing Selectable - Expert

    You should be able to adjust the value once this is enabled.

    Timings should be input for both Channel A and B

    Comment


    • #3
      The tRFC might be the issue, as many P67/Z68 can not go above 255 for that timing, but that is needed for high density kits (8GB modules) at higher frequencies. Your kit needs a tRFC of 278 for its XMP according to Aida64, so unless it is able to run DDR3-2133 with a reduced 255 you might have to settle with a lower memory frequency.
      Team HardwareLUXX | Show off your G.SKILL products!

      Comment


      • #4
        The last link is the working (i.e. it boots) configuration so, yeah, 255, which is the max I can input, seems to work.
        It doesn't boot when I leave the timings on auto.

        The only values from Aida I did not find on my BIOS were CR (is it Command Rate?), WTR and WLC. So I was left with nothing to enter in tWTP, tWL, Command Rate (CMD), IO latency and Round Trip Latency on my BIOS.

        Also, which one of the 2 XMP profile's values from Aida should I use?
        Last edited by PR3; 03-31-2016, 03:17 PM.

        Comment


        • #5
          CR = command rate = CMD in your BIOS
          WTR = tWTR in your BIOS
          WCL = write latency = tWL in your BIOS

          From your screenshots it looks like your board tries to set memory frequency to 1000MHz = DDR3-2000 with profile #1 enabled, so use the profile #2 instead.
          Team HardwareLUXX | Show off your G.SKILL products!

          Comment


          • #6
            I meant which one of the 2 profiles in Aida, the first one's called "Enthusiast" and the other one "Extreme", they seem to be both 2133 profiles but they have slightly different values.

            CMD = CR. So should I put 2/3? (depending on which aida's profile's right)
            tWTR = my bad, that one's present
            tWTP = ?
            tWL = WCL
            IO Latency & Round Trip Latency = is Auto ok? (2 and 39)


            And just to be sure, is it safe to leave the DRAM voltage on 1.6V when on 2133? The specs sheet of my mobo doesn't mention 1.6V but I'm gonna assume it's fine if XMP #2 sets it to 1.6V automatically.

            Sorry if I'm pedantic, but I never had to deal with anything RAM-related until now so I don't really have a lot of experience here.

            Comment


            • #7
              Can I get an answer to the last post, please?

              Comment


              • #8
                Use either one that allows the system to be stable.

                Yes, RAM is safe at 1.60V DDR3-2133

                Comment


                • #9
                  Originally posted by PR3 View Post
                  CMD = CR. So should I put 2/3?
                  tWTR = my bad, that one's present
                  tWTP = ?
                  tWL = WCL
                  IO Latency & Round Trip Latency = is Auto ok? (2 and 39)
                  Leave tWTP, IO Latency and RoundTrip Latency on auto and set Command Rate to 2T.
                  Team HardwareLUXX | Show off your G.SKILL products!

                  Comment

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