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Thread: Initial O/C settings for GA-EP45-DS3R?




  1. #1
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    Default Initial O/C settings for GA-EP45-DS3R?

    Building a new system;
    Antec Tower with Antec True Power 850W
    GA-EP45-DS3R
    4GB (4x1GB) Mushkin XP2-9200 5-5-5-15 2.1V
    Intel E8400 3.0Gz
    Sapphire ATI 4870 1GB

    I'd like to run the CPU at 3.6Gz and everything else optimized for speed and reliability. One piece of advice (for the CPU bump) was "simply do this: FSB 423 and all else set to auto. No voltage boost or any other tweaks." Seems too easy..

    Thanks for any help!
    Last edited by GaryR; 10-12-2008 at 03:44 AM.

  2. #2
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    Default Re: Initial O/C settings for GA-EP45-DS3R?

    First of all make sure you're using the latest BIOS!! (F10 works for me)

    Then go into advanced options and disable EIST and C1E.


    Set the following:

    MB Intelligent Tweaker(M.I.T.)

    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 400Mhz
    PCI Express Frequency (Mhz) .........:Set to 100

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


    DRAM Performance Control
    Performance Enhance...................: [STANDARD]

    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [333] << 400 may work as well
    System Memory Multiplier ..............: 2.00
    Memory Frequency (Mhz) ..............: 800
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time........................5
    tRCD .........................................5
    tRP'...........................................5
    tRAS..........................................15

    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….………......?????V..........: manually match the default voltage, can raise it later if it's not stable.

    CPU Termination…..... 1.200V*.......: <<< Leave
    CPU PLL…………………....1.500V*.......: <<< Leave
    CPU Referen.…………....0.755V*.......: <<< Leave
    CPU Reference2………,,0.800V*.......:<<< Leave

    MCH/ICH
    MCH Core…………….....1.100V...........: << 1.2 +/-
    MCH Reference….…….0.800V...........; <<< Leave
    MCH/DRAM Ref.…......0.900V...........: <<< Leave
    ICH I/O……………….....1.550V............: <<< Leave
    ICH Core…………...……1.100V............: <<< Leave

    DRAM
    DRAM Voltage ……....1.800V............: 2.1
    DRAM Termination .…0.900V............: <<< Leave
    Channel A Reference 0.900V............: <<< Leave
    Channel B Reference 0.900V............: <<< Leave

    I found with the latest bios you can leave pretty much everything else on auto

  3. #3
    Lsdmeasap's Avatar
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    Default Re: Initial O/C settings for GA-EP45-DS3R?

    Here is a full set of timings for 3.6 with the ram you listed at highest speed you can use it at.

    Set Mch latch and save and reboot, then set Static tread and save and reboot, and then move on to the rest.

    I would use Driving strength profile of 1066 or above as well

    E8400 @ 3.6Ghz W/ 4x1GB @ 1070 (watch the CPU Multi)

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio ..........................: 9
    Fine CPU Clock Ratio.....................:.0
    CPU Frequency ...........................: 3.618


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 402Mhz << Use just above or below 400 as it is the strap line and you do not want to use it exactly

    PCI Express Frequency (Mhz) .........:Set to 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)...................: <<< 50-200


    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [400]
    System Memory Multiplier ..............: 2.66
    Memory Frequency (Mhz) ..............: 1069
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time........................5
    tRCD .........................................5
    tRP'...........................................5
    tRAS..........................................12/15

    Advanced Timing Control
    tRRD...........................................3-4
    tWTR..........................................8-12
    tWR............................................8-14
    tRFC...........................................52-65
    tRTP...........................................4-7
    Command Rate (CMD) ....................:2

    Channel A
    Static tRead Value.........................:7-12
    tRD Phase0 Adjustment...................:<<< Leave for all below as well
    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.........................:7-12
    tRD Phase0 Adjustment...................:<<< Leave for all below as well
    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
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................: 1.3x <<< You will have to find the best spot for this, P45 has large Vdroop so 1. 4 is normally around 1.35 or so. Just keep that in mind. Most 8400's need around 1.3 actual to run 4Ghz so you will likely need less actual voltage to run 3.6, but I would start at setting around 1.35 in the BIOS

    CPU Termination…..... 1.200V*.......: <<< 1.34
    CPU PLL…………………....1.500V*.......: <<< 1.56
    CPU Referen.…………....0.755V*.......: <<< .61% Of Vtt (Termination above)
    CPU Reference2………,,0.800V*.......:<<< .67% Of Vtt (Termination above)

    MCH/ICH
    MCH Core…………….....1.100V...........: << 1.2-1.3
    MCH Reference….…….0.800V...........; <<< Leave
    MCH/DRAM Ref.…......0.900V...........: <<< Leave
    ICH I/O……………….....1.550V............: <<< Leave
    ICH Core…………...……1.100V............: <<< Leave

    DRAM
    DRAM Voltage ……....1.800V............: 2.0-2.1 << Mushkins normally run better at lower then spec, so try 2.0 or 2.05 first

    DRAM Termination .…0.900V............: <<< Leave
    Channel A Reference 0.900V............: <<< Leave
    Channel B Reference 0.900V............: <<< Leave

    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]

    ____________________________________________

    Or

    E8400 @ 3.6Ghz W/ 4x1GB @ 1130 (watch the CPU Multi)

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio ..........................: 8
    Fine CPU Clock Ratio.....................:0.5
    CPU Frequency ...........................: 3.613


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 425Mhz

    PCI Express Frequency (Mhz) .........:Set to 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)...................: <<< 50-200


    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [400]
    System Memory Multiplier ..............: 2.66
    Memory Frequency (Mhz) ..............: 1130
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time........................5
    tRCD .........................................5
    tRP'...........................................5
    tRAS..........................................15/18

    Advanced Timing Control
    tRRD...........................................3-5
    tWTR..........................................8-12
    tWR............................................8-14
    tRFC...........................................52-65
    tRTP...........................................4-7
    Command Rate (CMD) ....................:2

    Channel A
    Static tRead Value.........................:7-12
    tRD Phase0 Adjustment...................:<<< Leave for all below as well
    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.........................:7-12
    tRD Phase0 Adjustment...................:<<< Leave for all below as well
    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
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................: 1.3x <<< You will have to find the best spot for this, P45 has large Vdroop so 1. 4 is normally around 1.35 or so. Just keep that in mind. Most 8400's need around 1.3 actual to run 4Ghz so you will likely need less actual voltage to run 3.6, but I would start at setting around 1.35 in the BIOS

    CPU Termination…..... 1.200V*.......: <<< 1.34
    CPU PLL…………………....1.500V*.......: <<< 1.56
    CPU Referen.…………....0.755V*.......: <<< .61% Of Vtt (Termination above)
    CPU Reference2………,,0.800V*.......:<<< .67% Of Vtt (Termination above)

    MCH/ICH
    MCH Core…………….....1.100V...........: << 1.2-1.3
    MCH Reference….…….0.800V...........; <<< Leave
    MCH/DRAM Ref.…......0.900V...........: <<< Leave
    ICH I/O……………….....1.550V............: <<< Leave
    ICH Core…………...……1.100V............: <<< Leave

    DRAM
    DRAM Voltage ……....1.800V............: 2.0-2.1 << Mushkins normally run better at lower then spec, so try 2.0 or 2.05 first

    DRAM Termination .…0.900V............: <<< Leave
    Channel A Reference 0.900V............: <<< Leave
    Channel B Reference 0.900V............: <<< Leave

    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]

  4. #4
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    Default Re: Initial O/C settings for GA-EP45-DS3R?

    Thanks guys, mobo and CPU arrived today, Mushkin will be here tuesday!

  5. #5
    Lsdmeasap's Avatar
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  6. #6
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    Default Re: Initial O/C settings for GA-EP45-DS3R?

    I now *may* be building this system for a friend and re-ordering. Is there an advantage of going with a DDR3 setup using the same CPU? I was thinking of this -

    GA-EP45C-DS3R - GIGABYTE - Product - Motherboard - Specification - GA-EP45C-DS3R (rev. 1.0)

    Mushkin 4GB DDR3 1600 - Newegg.com - mushkin XP 4GB &#40;2 x 2GB&#41; 240-Pin DDR3 SDRAM DDR3 1600 &#40;PC3 12800&#41; Dual Channel Kit Desktop Memory - Desktop Memory

  7. #7
    Lsdmeasap's Avatar
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    Default Re: Initial O/C settings for GA-EP45-DS3R?

    You want my real opinion? DDR3 is not worth the money yet. It still has much to be improved design-wise, and you might as well just hold off for socket 1366 before making the switch to DDR3

  8. #8
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    Default Re: Initial O/C settings for GA-EP45-DS3R?

    Quote Originally Posted by Lsdmeasap View Post
    You want my real opinion? DDR3 is not worth the money yet. It still has much to be improved design-wise, and you might as well just hold off for socket 1366 before making the switch to DDR3
    Worked out well and I built the original system with the addition of a 4870 1GB as I sold my old stuff as a set.. All went great, no issues at all. I went right to 3.6GZ using your suggested settings for a 9X multiplier. One thing is strange though. CPUID shows it as running at 6X (2.4GZ) but if you watch it it changes to 9X (3618MZ), then changes back and forth every 10 seconds or so! Nothing is changing on the system, running smooth as silk. Vista reports it at 3.6 all the time... Is it a Vista 64 glitch in CPUID?

    Big thanks for your help!!


    Follow up - I found the Intel CPU ID Utility and ran it. It reports Core 1 and 2 both at 3.61GZ and the system bus at 1607Mz...
    Last edited by GaryR; 10-11-2008 at 06:16 AM.

  9. #9
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    Default Re: Initial O/C settings for GA-EP45-DS3R?

    You have speedstep on is why! Disable EIST and C1E and it will stay where you set it

    Nice to see you got all built without issues!

  10. #10
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    Default Re: Initial O/C settings for GA-EP45-DS3R?

    Quote Originally Posted by Lsdmeasap View Post
    You have speedstep on is why! Disable EIST and C1E and it will stay where you set it

    Nice to see you got all built without issues!

    Done, CPUID reports correctly and all seems perfect!

    Thanks again!

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