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Thread: GA-EP45-UD3P and four sticks of memory




  1. #1
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    Default GA-EP45-UD3P and four sticks of memory

    I have a GA-EP45-UD3P and four sticks of G Skill F2-9600CL5D memory. I can run any two of the sticks in either the red or the yellow slots. They pass memtest and run Vista just fine. My problem arises when I try to install MORE than two sticks. The system runs just fine with 4 Gb installed but will not run with 6 or 8Gb. No way, no how. I have tried BIOS settings from the G Skill forum and from this site. I have attached my BIOS setup. Please, someone has to have an answer. Thanks.
    GA-EP45-UD3P rev. 1.6, Bios FB
    E8400
    G Skill F2-9600CL5D-4GBTD (x2)
    Asus HD4850
    Vista x64 Ultimate

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: GA-EP45-UD3P and four sticks of memory

    Please update to the latest BIOS first, it is located here >>
    http://forums.tweaktown.com/f69/giga...st-bios-28441/

    Please read this guide for Qflash to update, DO NOT USE @BIOS >>
    http://forums.tweaktown.com/f69/bios...h-guide-27576/

    Then please give me your new settings. I can say you will need more than 1.20 MCH for 8GB, and you will need to loosen up tRD (Static tRead Value) to 8-10 as well. And you need to use B or D memory multipliers for 333-360+ FSB, B would be best.

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    Default Re: GA-EP45-UD3P and four sticks of memory

    Quote Originally Posted by Lsdmeasap View Post
    Please update to the latest BIOS first, it is located here >>
    http://forums.tweaktown.com/f69/giga...st-bios-28441/

    Where did that bios come from? It isn't listed on the Gigabyte website under bios downloads.


    Then please give me your new settings. I can say you will need more than 1.20 MCH for 8GB, and you will need to loosen up tRD (Static tRead Value) to 8-10 as well. And you need to use B or D memory multipliers for 333-360+ FSB, B would be best.
    I used C because it was the one that gave me 1200. What really is the difference? Actually I thought D would be the one to use. Isn't D the mult. that gives a 400Mhz FSB?

    I'm not trying to argue, I am trying to understand. Thanks loads for your help. I appreciate it.
    GA-EP45-UD3P rev. 1.6, Bios FB
    E8400
    G Skill F2-9600CL5D-4GBTD (x2)
    Asus HD4850
    Vista x64 Ultimate

  4. #4
    Chike is offline Senior Member
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    Default Re: GA-EP45-UD3P and four sticks of memory

    Which memory is it the PI or TD?

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    Default Re: GA-EP45-UD3P and four sticks of memory

    It is G Skill F2-9600CL5D-4GBTD
    GA-EP45-UD3P rev. 1.6, Bios FB
    E8400
    G Skill F2-9600CL5D-4GBTD (x2)
    Asus HD4850
    Vista x64 Ultimate

  6. #6
    Chike is offline Senior Member
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    Default Re: GA-EP45-UD3P and four sticks of memory

    Those aer low voltage, maybe they don't need so much DRAM voltage.

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    Default Re: GA-EP45-UD3P and four sticks of memory

    Most all the threads here and on the G Skill forum recommend the higher voltage. I really don't understand that either. If it's rated at 1.8v and DDR2 1200, it should work at 1.8v and 1200. G Skill actually recommended 2.2v.
    GA-EP45-UD3P rev. 1.6, Bios FB
    E8400
    G Skill F2-9600CL5D-4GBTD (x2)
    Asus HD4850
    Vista x64 Ultimate

  8. #8
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: GA-EP45-UD3P and four sticks of memory

    C sets the Northbridge to a very slow and tightly timed setting, something you only should use if your CPU is that slow of a default FSB.

    I said use B or D because your FSB is 333+, so B would be the optimal choice. If you must have 1200Mhz then you are going to need to adjust your FSB to go above 400 and use D multi's or use a different B multi

    333 B or 400 D, is not the FSB, your CPU freq is the actual FSB. When you set a strap or memory multiplier to A/B/C/D it is setting an internal timing and speed on the northbridge is all, nothing is changed with actual FSB speed that is determined by what you set (360 FSB if I remember right)

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    Default Re: GA-EP45-UD3P and four sticks of memory

    OK, I changed the mult to 3.2B. Attached is the new bios text file. System still runs great as long as I keep the memory down to two sticks. It still will not run on four sticks. Experimenting, I have discovered that the memory must be set to 2.0v at this speed. Also, the MCH Core and the ICH core will not run when set over 1.2v.

    Is there any real reason to keep Virtualization and USB Storage turned off?

    Can you tell me where the FDa bios came from? Is it from Gigabyte? I am very leary about flashing bios anyway, so I really want to know the source. I would also like to know what has been changed. I just don't want to take such a chance of bricking my MB if what was changed doesn't have anything to do with my problem.
    Thanks.
    Last edited by whtlightning; 10-30-2009 at 01:05 AM. Reason: added question
    GA-EP45-UD3P rev. 1.6, Bios FB
    E8400
    G Skill F2-9600CL5D-4GBTD (x2)
    Asus HD4850
    Vista x64 Ultimate

  10. #10
    Chike is offline Senior Member
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    Default Re: GA-EP45-UD3P and four sticks of memory

    Quote Originally Posted by whtlightning View Post
    System still runs great as long as I keep the memory down to two sticks.
    Both pairs of sticks and in any identical color slots?

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