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Thread: HELP: EP45-UD3P Dual Channel Problem!!!




  1. #1
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    Default HELP: EP45-UD3P Cant Run RAM in Dual Channel !!!

    hi, long time watcher, first time poster.

    my ga-ep45-ud3p (bios f4->f7->f9 none work, cmos cleared) wont boot my g. skill pc6400 2x2gb (f2-6400cl5d-4gbpq) (passed memtest x24hrs in single channel) ram set in slot 1&3. The computer jsut starts running for ~5 sec and then restarts. It never even posts. if i place the ram is slots 2&4 the computer turns on but never restarts or posts.

    if i put the ram in slot 1&2 (single channel) i can boot straight into windows. Also either chip will boot in slot one by itself.


    i have tried to increase the ram voltage to 1.8->1.9->2.0->2.1v. I have increased the MCH core 1.1->1.2->1.3. I have also dropped the timings to 6-6-6-18, at 667

    I recently tried someone elses PNY RAM with the same results

    it must be the board, right? is there something in the bios im missing or was this board DOA?


    e7400
    ga-ep45-ud3p (1.0)
    g. skill pc6400 2x2gb (f2-6400cl5d-4gbpq) (passed memtest x24hrs in single channel - ddr800)
    9800gtx
    ultra v-series 500w
    vista




    Bios Settings - See in post below
    Last edited by osme02; 06-24-2009 at 12:09 AM.

  2. #2
    Join Date
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    Default Re: HELP: EP45-UD3P Dual Channel Problem!!!

    Please post a template of your bios settings so people can help identify the problem.
    1) Gigabyte EP45-UD3P (rev 1.1, bios F9) E8400 @445x9@1.2625v bios, TRUE 120, Scythe UltraKaze 44cfm, 4x2gb GSkill 8500, Visiontek 3870, Corsair TX850, Antec 900, Win7-64 Home.
    2) Gigabyte EP45-UD3P (rev 1.1, bios F9) E8400 @500x8.5@1.2875v bios, TRUE 120, Schythe UltraKaze 44 cfm, 4x2gb Buffalo FireStyx 8500, XFX 5770, Corsair AX850, CM Scout, WinXP Pro/Win 7-64 Home.
    3) Gigabyte P55A-UD4P (rev 1.0, bios F5) i5 750 @190x20@1.30625v bios, CM Hyper 212+, 4x2gb G.Skill Ripjaw 1600, 7900GS, Corsair TX750, CM Scout, Win7 Pro-64.
    4) Asus P8Z68-V Pro (bios 0801), i5-2500K @44x100@1.248v cpuz, Megahalem rev.B, 4x4gb GSkill Sniper 1600, Corsair AX850, Antec 902, Corsair Performance 3 128GB, Win7-64 Home.


  3. #3
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: HELP: EP45-UD3P Dual Channel Problem!!!

    Yes, please post us your settings in full that you try. And also add a link to your exact ram model or post the exact model # and version so we can check spec voltages


    This is Just a template I use to ask people their settings, pay no attention to the numbers in it, replace with yours

    CPU = Model #
    Motherboard = Model, Revision #
    BIOS Version =
    Ram = Brand, Model#, Part#, And or Link

    Code:
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: Auto or Fast
    CPU Clock Ratio ..........................: 
    Fine CPU Clock Ratio.....................:.0
    CPU Frequency ...........................: 
    
    
    Clock Chip Control 
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled] 
    CPU Host Frequency (Mhz) ............: Mhz
    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)...................: <<< 
    
    
    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [Auto]
    System Memory Multiplier ..............: 
    Memory Frequency (Mhz) ..............: 
    DRAM Timing Selectable ................: [Manual]
    
    Standard Timing Control
    CAS Latency Time........................
    tRCD .........................................
    tRP'...........................................
    tRAS..........................................
    
    Set all Suggested below to highest Values first.  Then later you can lower, one at a time, testing as you go
    
    Advanced Timing Control
    tRRD...........................................
    tWTR..........................................
    tWR............................................
    tRFC...........................................
    tRTP...........................................
    Command Rate (CMD) ....................:2
    
    Driving Strength Profiles
    Driving Strength ............................
    
    Channel A
    Static tRead Value.........................:6/7-10 333/B MCH - 8/9-12 400/D MCH
     tRD Phase0 Adjustment...................:Auto <<< 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.........................:6/7-10 333/B MCH - 8/9-12 400/D MCH
     tRD Phase0 Adjustment...................:Auto <<< 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
    
    CPU
    CPU Vcore….……….........................:Auto if not overclocking, if you are overclocking please do find and set your own voltages
    
    CPU Termination…..... 1.200V*.......: << If overclocking Please set to stock, Auto overvolts this way to much.  Optimal range for overclock would be 1.2-1.5 depending on Vcore, try to keep at least .1 under vcore.  Auto is fine if not overclocking
    
    CPU PLL…………………....1.500V*.......: << If overclocking Please set to stock, Auto overvolts this way to much.  Optimal range for overclock would be 1.5-1.65.  Auto is fine if not overclocking
    
    CPU Referen.…………....0.755V*.......: <<< .64% Of Vtt (Termination above) Auto Will set this correctly 
    
    CPU Reference2………,,0.800V*.......:<<< .67% Of Vtt (Termination above) Auto Will set this correctly 
    
    MCH/ICH
    MCH Core…………….....1.100V...........: << 
    MCH Reference….…….0.800V...........; <<< Leave
    MCH/DRAM Ref.…......0.900V...........: <<< Leave
    ICH I/O……………….....1.500V............: <<< Leave
    ICH Core…………...……1.100V............: <<< Leave
    
    DRAM
    DRAM Voltage ……....1.800V............: 
    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] Enabled if you use Vmware/Virtual PC
    
    Integrated Peripherals
    Legacy USB Storage Detect ..............[Disabled] *Note* Must be enabled to flash from USB

  4. #4
    Join Date
    Jun 2009
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    Default Re: HELP: EP45-UD3P Dual Channel Problem!!!

    Please see first post for computer parts.

    [code]MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: Auto or Fast
    CPU Clock Ratio ..........................: 10
    Fine CPU Clock Ratio.....................:.0.5
    CPU Frequency ...........................: 2.8GHZ


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 266Mhz
    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
    (G)MCH Frequency Latch...............: [Auto]
    System Memory Multiplier ..............: 3.0A
    Memory Frequency (Mhz) ..............: 800
    DRAM Timing Selectable ................: [Manual]

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

    Set all Suggested below to highest Values first. Then later you can lower, one at a time, testing as you go

    Advanced Timing Control
    tRRD........................................... Auto
    tWTR.......................................... Auto
    tWR............................................Aut o
    tRFC...........................................Aut o
    tRTP...........................................Aut o
    Command Rate (CMD) ....................:2

    Driving Strength Profiles
    Driving Strength ............................ Auto

    Channel A
    Static tRead Value.........................: 8
    MCH
    tRD Phase0 Adjustment...................:Auto <<< 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.........................:8
    MCH
    tRD Phase0 Adjustment...................:Auto <<< 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

    CPU
    CPU Vcore….……….........................: 1.3v

    CPU Termination…..... 1.200V*.......: Auto

    CPU PLL…………………....1.500V*.......: Auto

    CPU Referen.…………....0.755V*.......: Auto

    CPU Reference2………,,0.800V*.......: Auto

    MCH/ICH
    MCH Core…………….....1.100V...........: 1.05, 1.1, 1.2, 1.22, 1.24, 1.3
    MCH Reference….…….0.800V...........; Auto
    MCH/DRAM Ref.…......0.900V...........:Auto
    ICH I/O……………….....1.500V............: Auto
    ICH Core…………...……1.100V............: Auto

    DRAM
    DRAM Voltage ……....1.800V............: 1.9v
    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 ..............[Enabled]
    Last edited by osme02; 06-23-2009 at 11:35 PM.

  5. #5
    Lsdmeasap's Avatar
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    Default Re: HELP: EP45-UD3P Dual Channel Problem!!!

    Try these and see how you get along, you may need to overclock or at least use a lower CPU multi and higher FSB so you can use the 333 strap easier

    So if you do not want to overclock your CPU freq, you may still want to use a higher FSB to make things easier. Try 8.5x333 and then use the 2.40B multi for your ram. CPU Voltage (Vcore and Vtt) may need adjusted to make this jump in FSB

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: Auto or Fast
    CPU Clock Ratio ..........................: 10
    Fine CPU Clock Ratio.....................:.0.5
    CPU Frequency ...........................: 2.8GHZ


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 266Mhz
    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
    (G)MCH Frequency Latch...............: [Auto]
    System Memory Multiplier ..............: 3.0A
    Memory Frequency (Mhz) ..............: 800
    DRAM Timing Selectable ................: [Manual]

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

    Set all Suggested below to highest Values first. Then later you can lower, one at a time, testing as you go

    Advanced Timing Control
    tRRD........................................... 3-4
    tWTR.......................................... 3-6 (Set 8 for now)
    tWR............................................4-6 (Set 10 for now)
    tRFC...........................................52-62 (Set 58)
    tRTP...........................................3-5
    Command Rate (CMD) ....................:2

    Driving Strength Profiles
    Driving Strength ............................ Auto << Set 800 or 1066, the latter may be best

    Channel A
    Static tRead Value.........................: 8 << Set 9 for now
    MCH
    tRD Phase0 Adjustment...................:Auto <<< 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.........................:8 << Set 9 for now
    MCH
    tRD Phase0 Adjustment...................:Auto <<< 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

    CPU
    CPU Vcore….……….........................: 1.3v

    CPU Termination…..... 1.200V*.......: Auto << Set 1.225-1.25

    CPU PLL…………………....1.500V*.......: Auto

    CPU Referen.…………....0.755V*.......: Auto

    CPU Reference2………,,0.800V*.......: Auto

    MCH/ICH
    MCH Core…………….....1.100V...........: 1.20-1.24
    MCH Reference….…….0.800V...........; Auto
    MCH/DRAM Ref.…......0.900V...........:Auto
    ICH I/O……………….....1.500V............: 1.5
    ICH Core…………...……1.100V............: 1.14

    DRAM
    DRAM Voltage ……....1.800V............: << Set 1.9-1.95
    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 ..............[Enabled] <<< Disable for now

  6. #6
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    Default Re: HELP: EP45-UD3P Dual Channel Problem!!!

    i tried your settings above and i have tried overclocking (Vcore at 1.325v) with:

    7X400 2.0B
    8x333 2.4B

    Again single channel mode works fine (slot 1&2)
    slots 1&3 reboot loop
    Last edited by osme02; 06-24-2009 at 12:01 AM.

  7. #7
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: HELP: EP45-UD3P Dual Channel Problem!!!

    Ahh well it very well could be incompatibility issues, but I have not seen any with G.Skill.

    I have however seen plenty of UD3x boards having dual channel issues, can you still RMA to the store you bought to get a replacement?

  8. #8
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    Default Re: HELP: EP45-UD3P Dual Channel Problem!!!

    i actually bought it off someone on anandtech forums that said it was an open box time. He said he had his tech test it with "3 different brands" of 2gbx2 with no problems. I dont see how that is possible since I have tried two brands (g. skill and PNY) with my reboot loop issue!
    Last edited by osme02; 06-24-2009 at 12:44 AM.

  9. #9
    Lsdmeasap's Avatar
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    Default Re: HELP: EP45-UD3P Dual Channel Problem!!!

    Ahh, that's not cool. He likely knew it was one of the boards with Dual channel issues and did not want to take the time to RMA it.

    You may need to RMA it, let me know if you need the page to do so

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