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Thread: 4-4-4-12 latencys on GA-P35-DS3R




  1. #1
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    Default 4-4-4-12 latencys on GA-P35-DS3R

    I have this 2x1G kit of A-data Vitesta EE 800+ that is suposed to run at 4-4-4-12 timings with a DDR voltage of 2.0-2.1V.
    So I set the above timings and DDR voltage to +0.2 in BIOS on my first board which was a DS3L rev 2.0 and it died on me (well known endless boot cycle) I have it RMA and exchenged for a DS3R rev2.1. Now I am a little afraid to try that again, since I read people also had the same problem with this board. What do you guys suggest to do in order to run my pc safe and stable with my DDR at the 4-4-4-12 timings at 800MHz? Should I increase the MCH and/or FSB voltage too?

    PS: my PC specs (in case they help): Intel Core 2 Duo E8400 3GHz (9x333), GA-P35-DS3R (2.1), kit 2x1G DDR2 A-Data Vitesta EE 800+, Galaxy GeForce 8600GT 512/128, HDD WD 160G Sata2, HDD WD 500G Sata2, DVD/RW - IDE, PSU Sirtec 460W

  2. #2
    Lsdmeasap's Avatar
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    Default Re: 4-4-4-12 latencys on GA-P35-DS3R

    Well I doubt it was just setting that timings that killed the BIOS. But things happen!

    I suggest you do manually set your timings and voltages, Here is where I would start with that ram, then work your way down from the higher numbers, testing after EACH timing change ONE BY ONE. You may also try bringing down the voltages later if you like

    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [9]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [333]
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [2.40] <<<Or which ever is closest to 800
    DRAM Timing Selectable_______ SPD __ [Manual]

    CAS Latency Time________________ 4
    Dram RAS# to CAS# Delay_________ 4
    Dram RAS# Precharge Delay_______4
    Precharge Delay (tRAS)__________12
    ACT to ACT Delay (tRRD)_________ 3-4
    Rank Write to READ Delay________ 9-11
    Write to Precharge Delay_________ 3-5
    Refresh to ACT Delay______________ 22-42
    Read to Precharge Delay__________ 3-5
    Static tRead Value_______________ 7-10
    Static tRead Phase Adjust________ 1-31 Leave on Auto 1-31 or Zero

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.300V]
    PCI-E OverVoltage Control_ [+0.1V]
    FSB OverVoltage Control___ [+0.1V]
    (G)MCH OverVoltage Control [+0.1V]
    CPU Voltage Control_______ [1.25] <<< Set to what you know works

  3. #3
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    Default Re: 4-4-4-12 latencys on GA-P35-DS3R

    thanks, i lowered my subtimings starting from the ones you told me. I have them reduced a little like this:
    ACT to ACT Delay (tRRD)___________3
    Write to Precharge Delay___________3
    Refresh to ACT Delay______________32
    Read to Precharge Delay___________3
    and the voltages of the DDR2, FSB and MCH set as you adviced me.

    It runs stable with this timins set, BUT the memory bandwidth and latency benchmarks with Everest and Sisoft Sandra shows me poorer results than running the memory at stock timings and voltage. Why is that? I have to tight up the subtimings even more?
    Last edited by weckker; 05-05-2008 at 04:51 AM. Reason: bad English :d

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    Default Re: 4-4-4-12 latencys on GA-P35-DS3R

    DDR2 timings/subtimings in Bios are set as following:

    CAS Latency Time_______________ 4
    Dram RAS# to CAS# Delay________ 4
    Dram RAS# Precharge Delay_______ 4
    Precharge Delay (tRAS)___________ 12

    ACT to ACT Delay (tRRD)_________ 3
    Rank Write to READ Delay________ 11
    Write to Precharge Delay_________ 6 (i got this wrong in my previous post)
    Refresh to ACT Delay____________ 32
    Read to Precharge Delay_________ 3
    Static tRead Value______________ 10
    Static tRead Phase Adjust________ auto

    and MemSet reports them as in the attached picture
    Attached Images Attached Images 4-4-4-12 latencys on GA-P35-DS3R-memset-jpg 

  6. #6
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    Default Re: 4-4-4-12 latencys on GA-P35-DS3R

    Bring Static tRead down, testing each time until you get to 7. Also try 4 here >>>
    Rank Write to READ Delay________ 11

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    Default Re: 4-4-4-12 latencys on GA-P35-DS3R

    Thank you
    I lowerd my subtimings to

    ACT to ACT------------------3
    Write to Read delay---------7
    Write to precharge----------6
    Refresh to ACT--------------26
    Read to Precharge-----------3
    Static tRead value----------6
    Static tRead Phase Adjust---auto

    it runs stable with pretty good results so I'm gonna let it work like this.
    Thank you again for helping!

  8. #8
    Lsdmeasap's Avatar
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    Default Re: 4-4-4-12 latencys on GA-P35-DS3R

    Anytime. Nice to see you got refresh to act so low. I would have suggested lower then I did but most cannot get it to run lower then 38 or so. Nice to see tRead on 6 for you as well! Sounds like good ram for it being a cheaper brand!
    Last edited by Lsdmeasap; 05-12-2008 at 02:24 PM.

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