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Thread: need help overclocking e8400 on ep43-ds3




  1. #1
    Join Date
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    Default need help overclocking e8400 on ep43-ds3

    Hi everyone, this is my first overclock and first post on this site so please tell me if I have missed out any useful information. I am attempting to overclock an E8400 processor on an Gigabyte EP43-DS3 board, I have 4GB of Kingston RAM in 2x2GB DIMMs. I have included my BIOS settings below:

    Motherboard: EP43-DS3, BIOS F9
    Cpu: E8400
    Ram: 4GB Kingston 800Mhz

    Code:
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : [Auto]
    CPU Clock Ratio ---------------------- : [9x]
    Fine CPU Clock Ratio ----------------- : [0.0]
    CPU Frequency ---------------------: 3.60 (400x9)
    
    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Enabled]
    CPU Host Frequency (Mhz) --------------: [400]
    PCI Express Frequency (Mhz) ---------- : [100]
    
    C.I.A.2 ------------------------------ : [Disabled]
    
    Advanced Clock Control ------- [Press Enter]
    CPU Clock Drive ---------------------- : <<< 800
    PCI Express Clock Drive -------------- : <<< 900
    CPU Clock Skew (ps) ------------------ : <<<
    MCH Clock Skew (ps) ------------------ : <<<
    
    DRAM Performance Control
    Performance Enhance ------------------- : [Standard]
    Extreme Memory Profile --- (X.M.P.) --- : [Disabled] <--- DONT HAVE THIS OPTION
    (G)MCH Frequency Latch ---------------- : [Auto]
    System Memory Multiplier -------------- : [Auto]
    Memory Frequency (Mhz) ---------------- : 800 960 <----THESE NUMBERS ARE BLUED OUT
    DRAM Timing Selectable ---------------- : [Auto]
    
    Standard Timing Control
    CAS Latency Time -------- 6 ---------- : [6]
    tRCD  ------------------- 6 ---------- : [6]
    tRP --------------------- 6 ---------- : [6]
    tRAS  ------------------- 18 ---------- : [18]
    
    Advanced Timing Control
    tRRD  ------------------- 3 ---------- : [Auto]
    tWTR  ------------------- 3 ---------- : [Auto]
    tWR --------------------- 6 ---------- : [Auto]
    tRFC  ------------------- 52 --------- : [Auto]
    tRTP  ------------------- 3 ---------- : [Auto]
    Command Rate (CMD) ------ 0 ---------- : [Auto]
    
    Driving Strength Profiles
    Driving Strength --------- : Press Enter
    
    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
    Voltage Types------------ Normal -------- Current -----
    Load-Line Calibration ----------------- :           <-----DONT HAVE THIS OPTION
    CPU Vcore --------------- 1.22500  ---- : [1.26875]
    
    CPU Termination --------- 1.200V* ----- : [1.200]
    CPU PLL ----------------- 1.500V* ----- : [1.500]
    
    CPU Reference ----------- 0.760V* ----- : [Auto]
    CPU Reference2 ---------- 0.800V* ----- :           <---DONT HAVE THIS OPTION
    
    MCH/ICH
    MCH Core ---------------- 1.100V ------- : [1.200]
    MCH Reference ----------- 0.760V ------- : [Auto]
    MCH/DRAM Ref ------------ 0.900V  ------ : [Auto]
    ICH I/O ----------------- 1.500V ------- : [1.500]
    ICH Core ---------------- 1.100V ------- :          <--- DONT HAVE THIS OPTION
    DRAM
    DRAM Voltage ------------ 1.800V ------- : [2.100]
    DRAM Termination -------- 0.900V ------- : [Auto]
    Channel A Reference ----- 0.900V ------- : [Auto]
    Channel B Reference ----- 0.900V ------- : [Auto]
    
    Advanced Settings
    Limit CPUID Max. to 3 ------------------ : [Disabled]
    No-Execute Memory Protect -------------- : [Enabled]
    CPU Enhanced Halt (C1E) ---------------- : [Disabled]
    C2/C2E State Support ------------------- : [Disabled]
    x C4/C4E State Support ----------------- : [Disabled]
    CPU Thermal Monitor 2 (TM2) ------------ : [Enabled]
    CPU EIST Function  --------------------- : [Disabled]
    Virtualization Technology -------------- : [Disabled]
    
    Integrated Peripherals
    Legacy USB Storage Detect  ------------- : [Disabled]
    With these settings my computer starts up fine and im able to log in, but when I run Prime95 I always get an error on at least one of the workers saying:

    FATAL ERROR: Rounding was 0.5, expected less than 0.4

    I have also taken some screenshots of CPU-Z to show you:

    [IMG]file:///C:/Users/User/Pictures/CPUZ%201.jpg[/IMG]Attachment 2738

    As you can see I have overclocked the processor to 3.6GHz, and that has upped the RAM from 400Mhz to 480Mhz. Quick question: why has my RAM speed increased? I havent actaully changed of the RAM settings in the BIOS.

    The error I get from Prime95 is apprantly from a problem with the RAM but I cant sort it out, any help would be greatly appreciated. As I said this is my first attempt at overclocking, I have learned what I can from this website and others but I could really use some guidance on how to stop that error from occurring in Prime95 and how this overclock can be made better.

    Thanks in advance

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: need help overclocking e8400 on ep43-ds3

    Kingston memory may not be a very good overclocker, at least the set you have anyway.

    You need to set the memory multiplier yourself manually, that way it is lower.

    This >>>
    System Memory Multiplier -------------- : [Auto] << Set to 2.00 and it will be twice your FSB then and the below option will not be blued out, but will show you the actual ram speed you will be using on the right
    Memory Frequency (Mhz) ---------------- : 800 960 <----THESE NUMBERS ARE BLUED OUT

  3. #3
    Join Date
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    Default Re: need help overclocking e8400 on ep43-ds3

    ok thanks, but which multipier do I use? i have 2.00A,B,C and D

  4. #4
    Join Date
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    Default Re: need help overclocking e8400 on ep43-ds3

    Usually 2.0D goes with 400 Fsb. A, B or C denotes the Mch strap 200, 333 or 266 being used.

    2.0B will also work upto 475FSB and not any Mhz higher in my case, there are such limitations.
    Last edited by yuu; 07-29-2010 at 09:07 AM.

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