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Thread: overclocking GA-EP45-DS3R




  1. #1
    Join Date
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    Default overclocking GA-EP45-DS3R

    I am looking to overclock. I have:

    GA-EP45-DS3R bios F8
    Intel Core 2 Duo E8500 (using Zalman 9700)
    CORSAIR XMS2 DHX 4GB DDR2 800 (PC2 6400)

    No settings have been touched in bios, so everthing is at default values; including my memory which is still at 5-5-5-18 in bios.

    I am looking for a simple overclock. I want to go for 3.8 Ghz so my memory timings would match for 1:1 at 400 Mhz .

    I know I need to change voltage for DDR2 to 2.1V for 4-4-4-12 and that I need to change CPU frequency to 400 Mhz. I aslo know I need to disable few options in the bios (not sure which ones though).

    There are a lot of AUTO settings. Not sure if and what settings I should adjust (especially voltages).
    I am great at following directions. I hope somebody could help or point me to place where I could instructions to this kind of overclock.

    Edit: I just found OC guide from Lsdmeasap. Looks good.
    Last edited by johnwaller; 08-23-2008 at 10:58 AM.

  2. #2
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    Default Re: overclocking GA-EP45-DS3R

    You can check my settings for a very similar board at:
    http://forums.tweaktown.com/f69/post...45-ds3l-27417/
    You would set your CPU clock at 400 and the multiplier at 9.5 (using the fine control for the 0.5). My settings are stable, with the exception of the "resume from S3" bug. LSD may give further guidance on settings - he is looking at mine to see if we can squeeze a bit more out of the memory timings.
    Gigabyte GA-EP45-DS3L (BIOS F9); E7200 Core2Duo 2.53Ghz 1066Mhz FSB 3MB L2 (OC to 3.4Ghz); SuperTalent 2x2G DDR2-800 PC6400 CL 5-5-5-12 (T800UX4GC5); Seagate 500GB SATA2 7200 32mb cache HD; EVGA 8800GT 512MB Superclocked Edition
    Ultra X-connect X2 550-watt PSU; Vista x64 SP1 and OpenSUSE 11.0 (KDE 4.1)

  3. #3
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: overclocking GA-EP45-DS3R

    Is this ram 2x2GB? If so you will not get 444-12 timings, maybe 544-12/15 but not likely.

    If you do want me to post you some settings for 3.8 I can but I just wanted to let you know the above before you started messing around in there and made your board unbootable.

    Let me know and I will post you some settings

    Here you go, try these ranges for 3.8 >>>>

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio ..........................: 9
    Fine CPU Clock Ratio.....................: .5
    CPU Frequency ...........................: 3800 (400 X 9.5 = 3800GHz/3.8GHz)


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


    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800mv
    PCI Express Clock Drive.................: <<< 900mv
    CPU Clock Skew (ps)....................: <<< 100-150ps (may not be needed at all)
    MCH Clock Skew (ps)...................: <<< 200-250ps (may not be needed at all)


    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [400]
    System Memory Multiplier ..............: [2.00] <<< 400 FSB X 2.00 = 800Mhz Ram Freq
    Memory Frequency (Mhz) ..............: 800Mhz
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time........................5

    tRCD .........................................5 (can test 4 but if you do use the highest Advanced settings below)

    tRP'...........................................5 (can test 4 but if you do use the highest Advanced settings below)

    tRAS..........................................15/18 (Can test 12, same as above statement)

    5-4-4-15 may work
    5-4-4-18 may work
    5-4-4-12 will likely not
    5-5-5-12 likely will work

    The below are Ranges, Set to the highest suggested the later lower ONE AT A TIME testing after each move.

    Advanced Timing Control [Press Enter]
    tRRD...........................................3-4
    tWTR..........................................4-6 (9-11)
    tWR............................................ 3-5 (7-12)
    tRFC...........................................52-62 (48-50 may work)
    tRTP...........................................3-6
    Command Rate (CMD) ....................:2

    Channel A
    Static tRead Value.........................:7-10
    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.........................:7-10
    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….……….........................: 1.325V << all up to you and your board/chip/cooling. I only need 1.32 for mine to do 4.2Ghz. A good starting try would be 1.325, if it fails raise it until it does not (Do this will all ram at highest settings). Keep a eye on your temps as well. 3.8 is not usually to hard to get at, but I have seen some having to use above 1.35. Like I said all up to your Chip, board and cooler


    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...........: << add +0.1 or 0.2 for 2x2GB
    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............: Set to 2.1V
    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]
    Last edited by Lsdmeasap; 08-23-2008 at 01:18 PM.

  4. #4
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    Default Re: overclocking GA-EP45-DS3R

    Hi LSD,

    I just built a new system with the EP45-DS3 and an E8400. Following your template above, tried 9 x 400mhz for 3.6ghz but could not get a POST. I was running

    CPU Host Frequency (Mhz) ............: 400 Mhz

    (G)MCH Frequency Latch...............: 400 Mhz
    System Memory Multiplier ..............: 2.00D
    Memory Frequency (Mhz) ..............: 800 800

    with CPU Vcore at 1.35 (other voltages on Auto) still no go. I'm running G.Skill DDR2 6400 (800Mhz) 5-5-5-15 RAM.

    A few questions I have after reading your post:

    The DDR2 sticks I have are rated for 1.8-1.9V... do I need to push this up to 2.1 ~ 2.2 as most settings recommend?

    Should the (G)MCH Frequency Latch be set to 400Mhz or 333Mhz?

    I would expect that my ram could run fine at DDR2 800Mhz, would I need more volts on the Vcore? I am running a Noctua NH-U12P and temps at stock speeds are 28, 38 degrees.

    If you have any suggestions that would be much appreciated.

  5. #5
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: overclocking GA-EP45-DS3R

    If the sticker on your ram says 1.8 or 1.9 then that is the MAX warrantied on the sticks. But 2.0 would be safe as well as 2.1 Likely but I would use a fan at 2.1 on G.Skills

    Do not use 2.2 unless you do not care about a warranty. And it is generally not needed even if that is the spec on the ram. Anyone reading this and using 2.2, please put a fan on your ram now. Thanks

    2.1 is a general amount most rams use. Yours may or may not need 1.9-2.0 even. They are rated for 555-15 at 1.9 so they should for sure do it if they are not DOA sticks. Which Model # is it?

    You can try 333 or 400, depends on your FSB. Both should work though, I would try 400 first since you are using 400 FSB

    EP45 has a huge Vdrop and Vdroop from what I have seen, so likely 1.35 is way less once you get into windows and you will need to set this higher in the BIOS

    For 2x2 sticks of ram, if that is what you have you will need to add some MCH voltage and be sure trfc is set to 52-62 manually

    And of course these will need to be disabled that are disabled below for stable overclocking >>>
    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled] << Can be left enabled
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: [Disabled]
    x C4/C4E State Support..................: [Disabled]
    CPU Thermal Monitor 2(TM2) ...........: [Enabled] << Can be left enabled
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Disabled]

  6. #6
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    Default Re: overclocking GA-EP45-DS3R

    the 3.6ghz oc with the higher timing settings and lower volt settings seems to give me BSOD's saying IRQ_NOT_LESS_OR_EQUAL :S
    e8500 3.16 o/c @ 3.7
    EP45-DS3R
    2x 4800's 512mb crossfire 9.11
    4gb Corsair 5-5-5-15 1066 ddr2
    X-FI Extreme Gamer
    Thermaltake 850w toughpower
    Razer Lachesis
    Logitech G15
    Windows7 64bit Retail

  7. #7
    Lsdmeasap's Avatar
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    Default Re: overclocking GA-EP45-DS3R

    Please give us your current full settings that fail and we can advise back. Be sure you are using the latest BIOS as well

  8. #8
    Chike is offline Senior Member
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    Default Re: overclocking GA-EP45-DS3R

    @Bluesky29

    Read this post for initial stock settings, follow steps 1-4 for providing some more information, preferrably in your own thread.
    Run some stress tests on the system with stock settings, 8+ hours Prime95/Orthos blend torture, or OCCT medium dataset, IBT(IntelBurnTest) at max stress level for 5-10 runs.
    Watch core temps wirh RealTemp or CoreTemp.
    HWMonitor (CPUID) and SpeedFan provide more monitoring outputs.

    Begin with that and users will be able to advise you further.
    I'm in the opinion that just throwing numbers will do you no good. A template with a setting from a similar system may or may not work and should only be used as a reference anyway.
    Knowing what you are doing may take you to places you have not imagined :-)

    Your system has the pontential to do 4GHz (relatively) easy, and beyond.

    EDIT: "newest BIOS" is a bit bogous, which one exactly?
    Last edited by Chike; 02-09-2010 at 07:52 AM.

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