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Thread: GA-EP45-UD3P 8GB Ram Problem




  1. #1
    Join Date
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    Default GA-EP45-UD3P 8GB Ram Problem

    Hey everyone, I own the GA-EP45-UD3P mobo, and i'm currently trying to get it to run 8gb of ram (4 x 2gb).

    Before this I had 4 gb (2 x 2gb) of Corsair pc8500 ram. They died, so I RMA'd them. While they were gone, I went to purchase 4 more gb or ram and found out corsair no longer sales the type of ram I already had. Instead I bought 4gb of G.Skill 8500 ram with nearly identical specs (2.1v, 5-5-5-15 timings). I installed the G.Skill ram, ran memtest, it was totally fine.

    Once I got the new 4gb of ram from Corsair, I went to install them and go up to 8gb (4 of Corsair, 4 of G.Skill). I looked BIOS settings online for running this mobo with 8gb of ram, and set them to the following:

    CPU Host Clock Control - Enabled
    CPU Host Frequency - 333
    Performance Enhance - Standard
    Extreme Memory Profile - Disabled
    System Memory Mulitplier - 3.20B
    DRAM Timing Selectable - Manual
    CAS Latency - 5
    tRCD - 5
    tRP - 5
    tRAS - 15

    Advanced Timing Control (submenu)
    tRRD - 4
    tWTR - 4
    tWR - 8
    tRFC - 80
    tRTP - 4
    Command Rate - 2

    Load Line Calibration - Disabled
    MCH Core - 1.40V
    DRAM Voltage - 2.10V

    Unfortunatley when I tried to start up, my comp wouldn't even post, it'd just try to start and fail in a loop. I tried taking out on of the sticks, to run only 6gb, and it seems to be running without any problems. What settings do I need to tweak to hit 8gb?

    Thanks

  2. #2
    kick's Avatar
    kick is offline Senior Member
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    Default Re: GA-EP45-UD3P 8GB Ram Problem

    um well i recently tested
    8gb of mixed ram 2x2 of 800mhz and 2x2 of 667 mhz and all 4 sticks would run easily at 400xpu ref(800mhz DDr2) 1600 fsb with 1.24 V mch.

    The 8 G wouldnt gp much above that on 5-5-5-15 timings/

    Because the memory is mixed, even tho the timings seem close .I would try and get them going at something higher than 333 mhz cpu ref(reduce cPu multiplier if needed) instead of trying to match 4 sticks from different manufacturers at their max rated speeds.
    cpu speed>fsb speed>memory speed theory.
    Current Systems:

    Asrock p67 Extreme6.............. Gigabyte EP-45 UD3 ...................... Gigabyte 73 PVM S2
    Intel i5 2500k 4.8ghz................ Intel Q8400 3.8ghz......................... Intel D820 2.8ghz
    Zalman 10x cooler.................... Coolermaster V8............................ HP cooler
    8GB Gskill ripjaw ddr3.............. 4GB Gskill PI ddr2.......................... 4GB samsung ddr2
    60GB ssd/500GB HDD .............. WD 1TB hdd.................................... Seagate 160GB hdd
    GTX 460 1GB x2 SLI ................. Msi 9600GT 512MB(died) ........... Onboard gx
    Win7 64 ,750w psu(ocz)............ Win7 64 ,520w psu,seasonic...... Win XP pro ,400w psu

    HEC 6A34 case . ....................... Jeantec R2 case............................ Packard Bell case

    hoping to upgrade to http://www.thinkgeek.com/stuff/41/habicase.shtml
    http://www.flixya.com/video/140325/Animal-launching

  3. #3
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: GA-EP45-UD3P 8GB Ram Problem

    What tRD (Static tRead Value) are you using, or what is auto setting?

    It may be too low, you can verify with Memset, it's called Performance Level in Memset, you can get that here
    http://forums.tweaktown.com/gigabyte...ity-tools.html

    It may be the mixed ram causing the issues, or maybe not? Your MCH looks to be a fair amount higher than you should need, that can also cause problems.

    What Vtt amount are you using, CPU Termination?

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