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Thread: GA-EP43-DS3L will not post with 4 x 2GB Ram




  1. #1
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    Default GA-EP43-DS3L will not post with 4 x 2GB Ram

    I want to add 2 x 2GB Ram to my computer. I have 2 x 2GB already. When I put in the extra 2 sticks of Ram, the machine loops through the Gigabyte splash screen and restarts. When I put in one additional 2 GB stick, the machine just stops at the mem test. Any suggestions as to where to start?

    I'm running Vista 64 if that makes a difference.

    Thanks.

  2. #2
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    Default Re: GA-EP43-DS3L will not post with 4 x 2GB Ram

    Ok, well we are going to need to know atleast the model of all the ram you have. But its possible if its all the same that you may have to raise you MCH voltages a fraction.
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  3. #3
    Chike is offline Senior Member
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    Default Re: GA-EP43-DS3L will not post with 4 x 2GB Ram

    First test the 2 additional memory sticks in slots 2 & 4, without the original pair.
    Have you made any changes in BIOS? Please post full settings, if you did, using the template in this post or the one after.
    What does PC Health Status reports for ram voltage?

    Please fill your forum sugnature with your syspem spec, including BIOS vers, board rev. and a link to memory spec page on maufactorer site, or at least model/part number.

    A screen capture of MemSet SPD(click spd) window for one stick of each set will also be helpful. MemSet can be found in http://forums.tweaktown.com/f69/late...30/#post284762

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    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: GA-EP43-DS3L will not post with 4 x 2GB Ram

    Ok, gathering the requested data...testing to see if Sig is working.
    Intel Core 2 Quad Q9450 @ 2.66 Ghz
    GA-EP43-DS3L, Rev. 1.0
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    Ram - Nvidia SLI Ready PC2 6400 5-4-4 @2.1v (2 x 2 GB)

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    Default Re: GA-EP43-DS3L will not post with 4 x 2GB Ram

    Attachment 1966

    First test the 2 additional memory sticks in slots 2 & 4, without the original pair. New Ram works fine in slot 2 & 4

    Have you made any changes in BIOS? No changes to BIOS, other than flashing to F7

    What does PC Health Status reports for ram voltage?
    Vcore - 1.140V
    DDR18V - 1.872V
    +3.3V - 3.280V
    +12V - 11.985 V

    New ram is 2 x 2GB Corsair CGM2X2G800

    MemSet Screenshot below (original Ram on left, new Ram on right)
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    Chike is offline Senior Member
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    Default Re: GA-EP43-DS3L will not post with 4 x 2GB Ram

    Check MemSet main window, if standard timings set to 6-6-6-18 and tRFC 51/52 try to increase MCH Core to 1.2v, if not set memory multiplier 2.40B and those timings manually, the rest on auto. See if you can boot with 4 sticks then.
    Do what are the increments for MCH Core?

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    Default Re: GA-EP43-DS3L will not post with 4 x 2GB Ram

    I checked the timings and they are 6-6-6-6-18

    But the tRFC is 46. Do I adjust that in the MemSet window or in the BIOS somewhere?

    I was able to change the MCH Core to 1.2 V, but I do not know how to set the memory multiplier 2.40B

    I'm going to test the system with just the MCH core voltage change and 4 sticks of ram. System will not post with only the MCH core voltage changed using 4 sticks of RAM
    Last edited by mcherry5; 12-07-2009 at 04:14 AM.
    Intel Core 2 Quad Q9450 @ 2.66 Ghz
    GA-EP43-DS3L, Rev. 1.0
    Bios Version F7
    Ram - Nvidia SLI Ready PC2 6400 5-4-4 @2.1v (2 x 2 GB)

  9. #9
    Chike is offline Senior Member
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    Default Re: GA-EP43-DS3L will not post with 4 x 2GB Ram

    Quote Originally Posted by mcherry5 View Post
    But the tRFC is 46. Do I adjust that in the MemSet window or in the BIOS somewhere?
    In BIOS, Advanced Timing Control.

    Quote Originally Posted by mcherry5
    I was able to change the MCH Core to 1.2 V, but I do not know how to set the memory multiplier 2.40B
    System Memory Multiplier (SPD). If the rightmost value below it(Memory Frequency,) is 800 don't worry about it, leave it auto.

    Quote Originally Posted by mcherry5
    I'm going to test the system with just the MCH core voltage change and 4 sticks of ram. System will not post with only the MCH core voltage changed using 4 sticks of RAM
    I don't follow.

  10. #10
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    Default Re: GA-EP43-DS3L will not post with 4 x 2GB Ram

    It isn't surprising that you're having problems. Combining RAM from different manufacturers isn't wise.

    Even RAM that is matched is sometimes difficult to get working at full speed in a 4x2GB config, let alone two different products.

    You can try but bear in mind it may turn out to be impossible.

    You will need to boot with your original RAM and alter some settings in the BIOS to stop these boot loops.

    Boot and go into the BIOS. Set primary RAM timings to 5-5-5-18 (this is the supported timing set of the Corsair, always set the timings for the loosest rated kit). Make sure XMP is also turned off. Being NVidia it may be called EPP. Go into advanced timings and set tRFC to 78. This is looser than you will need but better to give yourself some breathing space. Find the Static tRead setting and set 11 for both channels.

    You will also probably need more MCH Core voltage for 4x2GB. I'd set 1.30V to start with.

    For RAM voltage, be careful. Your OCZ can handle up to 2.2V. As you haven't linked to your Corsair RAM I have no idea what voltage it needs. I hope it's not rated at 1.8V..... Look on the sticker on the side of the Corsair. Hopefully it will be 2.0-2.1V. If it is 1.8V you can get away with setting 1.9-1.95V as a compromise.

    You can now save, exit and immediately turn off the PC. Fit the new RAM making sure that it's inserted correctly, ie matched pairs are in the correct order. To do this, insert the OCZ as if you were installing it on its own, in the right slots for dual channel. Now plug the Corsair into the unused slots.

    If it were me I'd either return the Corsair and try and get more of the exact same OCZ, or visa versa. Mixing RAM isn't good for your sanity, especially if just leaving everything on auto and expecting the board to sort it out for you. BIOS's are quite clever but even they are fallible.

    Please give a exact link to your Corsair RAM on the Corsair product page. Although the SPD info is somewhat useful, many manufacturers, including Corsair often don't program the SPD to show the RAM's top speed and tightest timings. I have some Corsair DDR-1066 that states a max of 400 in the SPD and identifies itself as PC-6400 (DDR-800).
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