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Thread: Memory Timing Settings




  1. #1
    Join Date
    Aug 2008
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    Default Memory Timing Settings

    Lsdmeasap,

    I'm back...haha...after you've helped me so much already I have a new question. I just updated the BIOS on my EP45-DS3R to F9 and even with the same settings my memory benchmarks have gone down. In particular latency has increased from 60ns to 72ns. I noticed that the memory timings in the new BIOS are slightly different than before. Should I change any of these:

    Current timings: 5-5-5-15
    trrd 3
    twtr 4
    twr 4
    trfc 55
    trtp 4
    command rate 2

    Channel A (or B) Timing
    Static t-read 8
    trd phase 0 Auto
    trd phase 1 Auto
    trd phase 2 Auto
    trd phase 3 Auto

    trd 2rd(Different rank) Auto
    trd2wr (Different rank) Auto
    twr2rd (Different rank) Auto
    twr2wr (Same/Different rank) Auto

    Dimm1 Clock Skew Auto
    Dimm2 Clock Skew Auto

    The same settings for Channel A and B

    My memory is 8GB (4 x 2GB) Corsair Dominator PC8500 currently running at 333MHz x 2.4 (1020 MHz)
    Last edited by mikeynavy1976; 08-22-2008 at 02:05 PM.

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Memory Timing Settings

    Those look pretty tight for 8GB, are you sure you want to mess up a good thing?


    Have you tested
    twtr 5-12 (often most any # will work, but it does affect bandwidth scores)

    Also, have you tried to see if tRD of 7 will work stable?


    Have you tested or messed with these settings any >>>
    CPU Clock skew..... 150ps
    MCH Clock skew...... 250ps

    You can try any setting on the DIM clock screws only testing will show you if they help or not.

    Like I said those are tight for 8GB, you may not get better with any changes.

    And also keep in mind, newer is not always better when it comes to BIOS's

  3. #3
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    Default Re: Memory Timing Settings

    I'll be moving this weekend but I'll try a slightly higher twtr after. Also, I did change the CPU and MCH Clock skews. That was the only way I could get my comp to boot at 3.4GHz.

  4. #4
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Memory Timing Settings

    Cool, well higher or lower tWTR could be better just have to test and see. Also tRD of 7 will be a much larger difference in bandwidth if you can get it to boot

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