GIGABYTE GA-EP45T-UD3P won't run with 8gb ram

Hello all, so quick questions to see if anyone else has ran into this.

I just built a new system with the GIGABYTE GA-EP45T-UD3P v1.0 MB and it is rated to handle 8gb of DDR3 ram, which I bought Corsair XMS3 (4X2gb) sticks and put them in.

It would not post, just several shrt beeps...so after some trial and error everything is fine but it will only run with 6bg of ram (3X2gb). All the Ram checks out so the sticks are good.

Anyone know why? Can I fix it? Bad slot? Bad Board? Bad Luck?

Thanks for any help.
9 answers Last reply
More about gigabyte ep45t ud3p
  1. You will need to make BIOS adjusments to run this (and you have Corsair, which, along with Kingston, account for ninety-odd percent of RAM problems w/GB MOBOs); the first thing to do is download a copy of MemTest86+ at:
    http://www.memtest.org/
    and burn the .iso to a bootable CD; then, put 1 stick at a time into slot 1, and boot/run MemTest overnight on each stick - this will qualify the RAM and tell you whether the sticks themselves are OK. If they all test OK, post back, and I'll try to walk you through BIOS tweaking...
  2. As far as the Memtest goes, all 4 sticks passed , so I moved on to the MCH COre Voltage and this is what happened. ANy input you can give me would be great, thanks.

    I have DDR3 RAM and WIndows Vista 64

    I raised the core 1.3...still same issue, beep, beep, beep....

    I raised the core to 1.4...it started up but windows didn't load

    I raised the core to 1.5...it started up, windows loaded but shortly locked up...restart.

    I raised the core to 1.6...Windows locked up on the log in screen

    I raised the core to 1.7...the beeps returned.

    So this looks like the issue, but before I break anything do you have any additional info, thanks.
  3. Here are the specs of the system. Let me know if you need more, thanks.

    RUNNING VISTA ULTIMATE 64

    RAM
    CORSAIR XMS3 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Dual Channel Kit Desktop Memory
    http://www.newegg.com/Product/Product.aspx?Item=N82E16820145218

    MB
    GIGABYTE GA-EP45T-UD3P LGA 775 Intel P45 ATX Intel Motherboard
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813128369&Tpk=GIGABYTE%20GA-EP45T-UD3P%20LGA%20775%20Intel%20P45%20ATX%20Intel

    CPU
    Intel Core 2 Quad Q9550 Yorkfield 2.83GHz 12MB L2 Cache LGA 775 95W Quad-Core Processor
    http://www.newegg.com/Product/Product.aspx?Item=N82E16819115041&Tpk=Intel%20Core%202%20Quad%20Q9550%20Yorkfield%202.83GHz%2012MB

    POWER
    PC Power & Cooling / Silencer / 750-Watt / Quad PCI-Express / SATA-Ready / Red Power Supply, 80Plus
    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3247721&CatId=2533

    VIDEO CARD
    EVGA 512-P3-N871-AR GeForce 9800 GTX(G92) 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card
    http://www.newegg.com/Product/Product.aspx?Item=N82E16814130339&Tpk=EVGA%20512-P3-N871-AR%20GeForce%209800%20GTX%28G92%29%20512MB
  4. Those pointers that you posted for your components were 'broken' by the forum's address truncation feature; what it's supposed to do is post a 'viewable' of a truncated address, while keeping the actual address whole and invisible, but accessible to a click... It's actually broken - works sometimes, screws up when it pleases - I've posted numerous times, but it never seems to get fixed! You need to post these as text - I need to check a couple component ratings and get back to you - mainly concerned about your RAM voltage. I've got a 9550 that'll run over 4G (If I could stand the heat in the room) at a Vcore of 1.35 on the same family MOBO (a DS5) so I know somethings set wrong - once I see the relevant specs, I'll post a likely candidate BIOS template...
  5. Try it now, thanks.

    Here are the specs of the system. Let me know if you need more, thanks.

    RUNNING VISTA ULTIMATE 64

    RAM
    CORSAIR XMS3 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Dual Channel Kit Desktop Memory
    http://www.newegg.com/Product/Product.aspx?Item=N82E16820145218

    MB
    GIGABYTE GA-EP45T-UD3P LGA 775 Intel P45 ATX Intel Motherboard
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813128369&Tpk=GIGABYTE%20GA-EP45T-UD3P%20LGA%20775%20Intel%20P45%20ATX%20Intel

    CPU
    Intel Core 2 Quad Q9550 Yorkfield 2.83GHz 12MB L2 Cache LGA 775 95W Quad-Core Processor
    http://www.newegg.com/Product/Product.aspx?Item=N82E16819115041&Tpk=Intel%20Core%202%20Quad%20Q9550%20Yorkfield%202.83GHz%2012MB

    POWER
    PC Power & Cooling / Silencer / 750-Watt / Quad PCI-Express / SATA-Ready / Red Power Supply, 80Plus
    http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3247721&CatId=2533

    VIDEO CARD
    EVGA 512-P3-N871-AR GeForce 9800 GTX(G92) 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card
    http://www.newegg.com/Product/Product.aspx?Item=N82E16814130339&Tpk=EVGA%20512-P3-N871-AR%20GeForce%209800%20GTX%28G92%29%20512MB
  6. masterjakk said:
    Hello all, so quick questions to see if anyone else has ran into this.

    I just built a new system with the GIGABYTE GA-EP45T-UD3P v1.0 MB and it is rated to handle 8gb of DDR3 ram, which I bought Corsair XMS3 (4X2gb) sticks and put them in.

    It would not post, just several shrt beeps...so after some trial and error everything is fine but it will only run with 6bg of ram (3X2gb). All the Ram checks out so the sticks are good.

    Anyone know why? Can I fix it? Bad slot? Bad Board? Bad Luck?

    Thanks for any help.



    Hello there

    did you get your problems resolved with the gigabyte-UD3P mobo?

    I have had similar problems, but mine I think could be associated with the video card, I have a BFG 9800 GTX+, w/1 GBT, and can't even install vista, 64 bit, either Home Premium or Ultimate but works fine with 32 bit vista business. Also will not work with G.Skill DDR3 1333 2x4 , but will work at 2x2. ?

    Using OCZ Urban Warfare DDR3 1600 2x2 Gbts 8-8-8-24 timing
    Intel Core 2 QC 9550 2.83
    PC Power & Cooling 750W PS
  7. Try this for your an overclock at 400 FSB >>>>
    MB Intelligent Tweaker(M.I.T.)

    Robust Graphics Booster ...............: Auto
    CPU Clock Ratio ..........................: 8
    Fine CPU Clock Ratio.....................:.0.5
    CPU Frequency ...........................: 3.41 (401x8.5)


    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 401Mhz
    PCI Express Frequency (Mhz) .........:Set to 100

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


    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: no change
    PCI Express Clock Drive.................: no change
    CPU Clock Skew (ps)....................: no change
    MCH Clock Skew (ps)...................: no change

    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [400]
    System Memory Multiplier ..............: 3.33D
    Memory Frequency (Mhz) ..............: 1337
    DRAM Timing Selectable ................: [Manual]

    Standard Timing Control
    CAS Latency Time........................9
    tRCD .........................................9
    tRP'...........................................9
    tRAS..........................................24
    Set all below to highest and then lower one at a time testing as you go

    Rest of memory timings to auto...


    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU Vcore….……….........................: 1.375 << Intel's Max Vcore is 1.3625V, but GB regulators tend a bit low - do not raise above 1.4 ever - will degrade CPU & shorten its' working life...

    MCH/ICH
    MCH Core…………….....1.100V...........: << 1.2-1.3 (Also try stock)

    DRAM
    DRAM Voltage ……....1.600V............: 2.1
    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
  8. Thanks I will try this and post back ASAP.
  9. You aren't supposed to use 4gb sticks... maximum supported is 2gb
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