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F3-1866C8D-16GTK M5A99FX PRO R2.0 Phenom X6 1090T

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  • F3-1866C8D-16GTK M5A99FX PRO R2.0 Phenom X6 1090T

    Hey guys.

    I just upgraded by motherboard from an ancient 780 chipset AM2+ DDR2 board to a modern AM3+ board. Installed 16Gb of Trident 1866 RAM in it.

    First off, thank you guys for making the heat sinks on the DIMMs removable! It's a tight fit in my case, and taking the fins off let everything fit!

    Once I got everything rebuilt, with memory settings on AUTO, it came up as 16 Gb at 1333 Mhz. That's nice and safe, so cool beans.

    What timings can I try driving this memory at to get a little more speed out of it?

    How fast will a Phenom X6-1090T go before stability is a problem?

    I'm not looking at an 3xt33m3 0v3rcl0ck here, I'm just aiming to see if I can drive it at its rated speed.

    In a few months, I'll be swapping out the CPU for an FX-8370 - how does that change timings?

    Thanks.

  • #2
    Here is the guide for DDR3-1866

    http://www.gskill.us/forum/showthread.php?t=11742

    Let us know how it goes!

    Comment


    • #3
      OK, so here is what I did:

      1. CPU Host Frequency will need to be 233 for DDR3-1866. Set to 233

      Note, this will also overclock your CPU Frequency, so you should lower the CPU Ratio if this is not desired. CPU ratio set to 14 (3264Mhz from 3200 Mhz)

      2. CPU-NB Frequency should be 2800MHz, or 12X (233 * 12.00 = ~2800MHz). Set to 2794

      Then set DRAM Timings tCL - tRCD - tRP - tRAS - Command Rate/Timing (that the memory is rated for). Set to 8-9-9-24-2T

      3. DRAM Voltage (that the memory is rated for) Set to 1.60


      4. Lastly, CPU-NB Voltage +0.1V. Set to 1.225 (from 1.125)


      5. F10, save, exit, and everything should be ready to go.

      System booted!

      lshw reports CPU bus at 200 Mhz and RAM at 1600

      Unique Tropics went from 112.81 FPS to 113.92 FPS, which is practically a tie.

      Rebooting back into BIOS, it reports:

      Current CPU Speed: 3292 Mhz
      Current Memory Frequency: 1864 Mhz
      Current NB Frequency: 2796 MHz
      Current HT Link Speed: 1864 Mhz

      So it looks like it took, but maybe it isn't being reported to Linux properly? i.e. it is running at 233/1866, but for whatever reason, it is being reported as 200/1600.

      Holy crap, my SSD benchmark just jumped from 444 Mb/sec to 454 Mb/sec!

      OK, so something clearly happened....

      Let me see if the system is stable and run some more benchmarks.

      Comment


      • #4
        Check this out:

        http://openbenchmarking.org/result/1...LI-RAMSPEEDD94

        The interesting thing though is that, after tweaking the settings per instructions, now my CPU is reporting itself as 2.8 Ghz vice 3.2 Ghz.

        That isn't held up in the ram speed test though.

        Let me try a CPU bound benchmark and see what happens.

        Here we go:

        http://openbenchmarking.org/result/1...LI-RAMSPEEDD94

        http://openbenchmarking.org/result/1...LI-7ZIPCOMPR84

        http://openbenchmarking.org/result/1...LI-X264DDR2X12

        http://openbenchmarking.org/result/1...LI-UNIQUEHEA11

        http://openbenchmarking.org/result/1...LI-UNIQUETRO98
        Last edited by RecceDG; 03-03-2015, 08:49 AM.

        Comment


        • #5
          What is it set to and did you use another software to see what it is actually running at?

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