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Thread: GA-EP45C-DS3R memory and voltage questions




  1. #1
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    Default GA-EP45C-DS3R memory and voltage questions

    Attn, Lords of PC knowledge:

    I recently finished a new build that included following components:

    Gigabyte GA-EP45C-DS3R Motherboard
    Intel Core 2 Duo E8400 Processor
    Western Digital Velociraptor WD3000GLFS 300GB
    EVGA 512-P3-N-802-AR GeForce 8800 GT (Superclocked)
    Samsung 20x DVD Burner SH-S203
    G.Skill 4GB RAM F2-8500CL5D-4GBPK

    My Questions:

    1.) The Ram is supposedly DDR2 1066 but at auto settings it comes up as DDR2 800. G.Skill advised me to manually set timings and voltage. This did not work. Can you walk me through either overclocking this memory to its "default" specs or tell me how to enable the XMP profile settings so that they really work? The Ram has the "correct" settings in thier xmp profile but I can not get the profile to load even when I enable it.

    2.) I am also trying to apply a moderate overclock to the CPU but the CPU voltage always seems to be at auto settings even if I manually change it to something else. I've tried setting darn near everything to manual and disabling the power saving features that might interfere with my settings, but no dice. CPU-z shows the CPU voltage constantly fluctuating and far lower than the voltage I set it to. How can I lock down the CPU voltage in the bios (F4b), thus letting me get to my overclocking?

    Thanks for any help you can offer.

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: GA-EP45C-DS3R memory and voltage questions

    You will need to manually set the DDR2 voltage to it's spec, and add some MCH Voltage for the XMP profiles to likely work. 1.2-1.3 should be enough MCH. Stock spec for your ram should be on the sticker, likely 2.1V

    As for your CPU venture, sounds like you have not disabled every speedstep feature.

    Here is a starting set of timings/settings for you at stock, with speedstep disabled so you can start your overclocking venture >>>

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio ..........................: 9
    Fine CPU Clock Ratio.....................:.0
    CPU Frequency ...........................: 3.00Ghz


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 333Mhz
    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)....................: <<<
    MCH Clock Skew (ps)...................: <<<


    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [333]
    System Memory Multiplier ..............: 3.20
    Memory Frequency (Mhz) ..............: 1065MHz
    DRAM Timing Selectable ................: [Manual]

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

    Advanced Timing Control
    tRRD...........................................3-4
    tWTR..........................................3-6 (May need 8-12)
    tWR............................................3-6 (May need 8-14)
    tRFC...........................................52-62 << Must for 2x2GB
    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….……….........................: Auto Or Normal for stock
    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...........: << 1.20- 1.30 << Needed for stable 2x2GB operation

    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............: Check sticker, likely 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]

    Once you get that stable and running post back. Or post back if you have issues, with the settings you tried and I will suggest changes

  3. #3
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    Default Re: GA-EP45C-DS3R memory and voltage questions

    Thanks man! I'll try this out as soon as I get home and let you know if it works out.

  4. #4
    Lsdmeasap's Avatar
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    Default Re: GA-EP45C-DS3R memory and voltage questions

    It should for sure as long as one of your sticks is not DOA. Which can happen, I suggest always to check new RAM with memtest86+ on the first day you get it, to be sure none is DOA. It can happen with any brand >>>
    Memtest86+ - Advanced Memory Diagnostic Tool

  5. #5
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    Default Re: GA-EP45C-DS3R memory and voltage questions

    Ok, so I plugged in the Ram settings you suggested with no success. I tried tightening the settings with no luck. I tried loosening the settings with no luck. The memory always boots as PC2 6400 as per CPU-z. The voltage changes are there but its just overpowered DDR2 800. I ran Memteset86+ overnight with no errors. I'm stumped. I'd love to just chuck the modules and buy some nice DDR3 but I don't have the cash yet. I have to make these work for a while. Do you have any other tricks up your sleeve?

    On the overclocking front; When I manually set the CPU vcore voltage it will not stay at the voltage I set. I set 1.27 or 1.3 and it always reverts back to 1.216 or so. If I set the voltage to Auto and then increase CPU host freq from 333 to a slightly higher setting the voltage will increase a little on its own and the overclock will be achieved. I'm not really sure how far I can or should take this. I want to be able to manually set the voltage. Can I do this without it changing itself down to a lower amount? Can the CPU vcore be forced to stay at 1.28 or 1.3?
    Last edited by anarKHAN; 09-11-2008 at 12:44 AM. Reason: typo

  6. #6
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    Default Re: GA-EP45C-DS3R memory and voltage questions

    Oh, and thanks for the help!

  7. #7
    Lsdmeasap's Avatar
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    Default Re: GA-EP45C-DS3R memory and voltage questions

    Well tighter is not the way to go when timings fail! You need to loosen them.

    Try this in addition to the above
    (G)MCH Frequency Latch...............: [Auto]
    System Memory Multiplier ..............: 3.20
    Memory Frequency (Mhz) ..............: 1065MHz

    tRRD...........................................5
    tRFC...........................................70
    Static tRead Value.........................:12

    No you can change the voltage all you want, but you must have a stable boot otherwise it will revert to defaults, that is likely what you are seeing. Be sure if you do to load and apply optimized defaults before you go into windows, and make your disk changes before you load windows as well. See my guide for proper flashing techniques if you are unsure of all of your Options. DO NOT USE @BIOS!

    I would suggest you flash back to a NON Beta BIOS, it may be giving you ram errors in itself and causing them to fail

    DDR3 is not much better, all hype I see. Faster speeds sure, but at WAY looser timings and way more $$

    Ya know, the XMP profiles should load and work if you set the correct voltages for DDR2 and MCH. Maybe try those again as well after you flash if the above is still no good.

    You ARE setting command rate: 2 right?

  8. #8
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    Default Re: GA-EP45C-DS3R memory and voltage questions

    I'll get on it as soon as I get home. Thanks.

  9. #9
    Lsdmeasap's Avatar
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  10. #10
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    Default Re: GA-EP45C-DS3R memory and voltage questions

    Thanks, we'll see soon enough.

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