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Thread: ep35-ds3r>ep45-dq6 can't set ram same speed




  1. #1
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    Default ep35-ds3r>ep45-dq6 can't set ram same speed

    I change from ep35-ds3r to ep45-dq6.
    ep35 run memory 1050 cl5 2.0v tRD=7
    ep45 run memory 1050 cl5 2.05v tRD=9
    set to 8 can boot but not stable ,set to 7 can't boot
    Any advice to adjust bios ep45-dq6.
    e6420 bus 420 speed 3.36GHz
    memory OCZ reaper pc6400 cl3 1G*2
    I change
    cpu vcore 1.375
    cpu termination 1.28
    .
    mch core 1.3
    dram voltage auto

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: ep35-ds3r>ep45-dq6 can't set ram same speed

    P35 and P45 are VERY Different

    It depends on what FSB and Memory multi you are using as to what you can set tRD to. If you need help please post your full settings, link in my signature for template.

    And just so you know, P45 tRD of 7 is equal to P35 tRD 6 in my findings. And so on meaning one more tRD in P45 is equal to one lower in P35.

    Depending on your voltages and FSB this is the general tRD rule for P45 >>
    6/7-10 if using 333/B Memory Multi/FSB Strap

    8/9-12 If using 400/D Memory Multi/FSB Strap
    Last edited by Lsdmeasap; 08-16-2009 at 12:16 AM.

  3. #3
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    Default Re: ep35-ds3r>ep45-dq6 can't set ram same speed

    here my setting. check in memset tRD=9 ,hwmonitor v-ddr 2.05
    if set manual to tRD =8 test with occt has error,7 can't boot.
    So I decide higher overclock to change multiplier to 2.66D run at 1120,check in memset tRD=7 ,hwmonitor v-ddr 2.24 but it not stable too.
    Any value I can increase?

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : [Auto]
    CPU Clock Ratio ---------------------- : [8x]
    Fine CPU Clock Ratio ----------------- : [0.0] <-- ignore if not available
    CPU Frequency ---------------------: 3.36 (420x8) <-- this is set by your bios

    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Enabled]
    CPU Host Frequency (Mhz) --------------: [420]
    PCI Express Frequency (Mhz) ---------- : [Auto]

    C.I.A.2 ------------------------------ : [Disabled]

    Advanced Clock Control ------- [Press Enter]
    CPU Clock Drive ---------------------- : [800]
    PCI Express Clock Drive -------------- : [900]
    CPU Clock Skew (ps) ------------------ : [0]
    MCH Clock Skew (ps) ------------------ : [0]

    DRAM Performance Control
    Performance Enhance ------------------- : [extreme]
    Extreme Memory Profile --- (X.M.P.) --- : [auto]
    (G)MCH Frequency Latch ---------------- : [Auto]
    System Memory Multiplier -------------- : [2.50A]
    Memory Frequency (Mhz) ---------------- : [1050]
    DRAM Timing Selectable ---------------- : [Auto]

    Standard Timing Control
    CAS Latency Time -------- 5 ---------- : [Auto]
    tRCD ------------------- 5 ---------- : [Auto]
    tRP --------------------- 5 ---------- : [Auto]
    tRAS ------------------- 15 ---------- : [Auto]

    Advanced Timing Control
    tRRD ------------------- 4---------- : [Auto]
    tWTR ------------------- 5 ---------- : [Auto]
    tWR --------------------- 6---------- : [Auto]
    tRFC ------------------- 42---------- : [Auto]
    tRTP ------------------- 5 ---------- : [Auto]
    Command Rate (CMD) -------------------- : [Auto] <--- Auto or 0 is OK

    Driving Strength Profiles
    Driving Strength --------- : auto

    Channel A
    Static tRead Value --------------------- : [Auto]
    tRD Phase0 Adjustment ------------------ : [Auto]
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto] ps
    Dimm2 Clock Skew Control --------------- : [Auto] ps

    Channel B
    Static tRead Value --------------------- : [Auto]
    tRD Phase0 Adjustment ------------------ : [Auto]
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto] ps
    Dimm2 Clock Skew Control --------------- : [Auto] ps

    Motherboard Voltage Control
    CPU

    CPU Vcore ---------------1.325 ---- : [1.375]

    CPU Termination --------- 1.2V* ----- : [1.28]
    CPU PLL ----------------- 1.5V* ----- : [Auto]

    CPU Reference ----------- 0.760V* ----- : [Auto]
    CPU Reference2 ---------- 0.800V* ----- : [Auto]

    MCH/ICH
    MCH Core ---------------- 1.1V ------- : [1.3]
    MCH Reference ----------- 0.760V ------- : [0.770]
    MCH/DRAM Ref ------------ 0.900V ------ : [Auto]
    ICH I/O ----------------- 1.5V ------- : [1.54]

    DRAM
    DRAM Voltage ------------ 1.8V ------- : [Auto]
    DRAM Termination -------- 0.900V ------- : [Auto]
    Channel A Reference ----- 0.900V ------- : [Auto]
    Channel B Reference ----- 0.900V ------- : [Auto]

  4. #4
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: ep35-ds3r>ep45-dq6 can't set ram same speed

    If you are using the D strap (2.66D) then you will have best luck using 8-9 tRD

    If you only have 4GB of ram your MCH is way to high, I'd suggest 1.20-1.24V

  5. #5
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    Default Re: ep35-ds3r>ep45-dq6 can't set ram same speed

    I only have 2GB.
    MCH 1.20-1.24 can't open windows it must 1.28-1.30
    I have doubt with "MCH Reference" in bios 0.760, in manual 0.800,Which is right?
    And "MCH/DRAM Ref" effect to what?

  6. #6
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: ep35-ds3r>ep45-dq6 can't set ram same speed

    Ahh, well please try less than stock MCH, if your board allows, and then try Auto. With only 2GB you do not need an increase at all to this setting, maybe a little 1.12-1.16 for FSB Increase but for sure not 1.3. That would only be needed for 8GB of ram or 550+ FSB

    MCH Ref must be set properly, how to do that is in a guide linked in my signature. The default is .76 when Vtt is at 1.20

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