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Thread: GA-P31-DS3L Memory Upgrade Problem




  1. #1
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    Default GA-P31-DS3L Memory Upgrade Problem

    RAM upgrade problem
    <hr style="color: rgb(0, 0, 0);" size="1"> <!-- / icon and title --> <!-- message --> I've bought two extra sticks of RAM, each 1GB.

    The problem is that the BIOS only reports 2GB while Windows 7 64-bit says that 4GB is installed but only 2GB is usable. I've tried flashing my BIOS but it had no effect.

    My motherboard is a Gigabyte GA-P31-DS3L.

    After a while, I kept trying to insert the RAM modules to different slots and somehow managed to go up to 3GB.

    The weird part? If I put the 2 sticks with the same specs near each other, 2GB will work fine, inserting one of the other sticks will still show 2GB and only when I insert the last one will it show 3GB, I tested each slot and stick seperately and they all work.

    Also to keep using 3GB I had to lower the SPD from 2.50 to 2.00 so the RAM is operating at 533Mhz.

    Also, if I put the old sticks in the red slots instead of the yellow ones, the PC will keep restarting infinitely.

    Screenshots from CPU-Z:

    Old RAM:

    http://i19.photobucket.com/albums/b1...KingX/ram1.jpg

    New RAM:

    http://i19.photobucket.com/albums/b1...KingX/ram2.jpg

    It just doesn't make sense.

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: GA-P31-DS3L Memory Upgrade Problem

    Well first of all, you need to use 64 bit OS to use 4GB, just to clear that up.

    You need to put the sticks in the right slots, which you probably did when you saw 3GB. One matching set should go in slot 1+3, and the other matching set in slot 2+4.

    Mixing memory sets usually causes problems, but you might be ok with these sets once you setup the BIOS properly. I think the problem is MCH Voltage and tRFC setting, these need increased for 4GB, static Tread Value may also be off.

    But you may be ok, by using 2.0V for the memory voltage instead of Auto or 1.8V

    Please grab a template from my signature (P35 one is fine) and give me your full specs, and current BIOS Settings in full and I will advise back. Please also tell me what BIOS you are now using, latest (F10a) is here
    GA-P31-DS3L (rev. 1.x) - GIGABYTE - Support&Download - Motherboard - BIOS


    For my reference later
    http://www.corsair.com/_datasheets/CM2X1024-5400C4.pdf
    http://www.comx-computers.co.za/ME-C...-pdf-20468.php

  3. #3
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    Default Re: GA-P31-DS3L Memory Upgrade Problem

    Quote Originally Posted by Lsdmeasap View Post
    Well first of all, you need to use 64 bit OS to use 4GB, just to clear that up.

    You need to put the sticks in the right slots, which you probably did when you saw 3GB. One matching set should go in slot 1+3, and the other matching set in slot 2+4.

    Mixing memory sets usually causes problems, but you might be ok with these sets once you setup the BIOS properly. I think the problem is MCH Voltage and tRFC setting, these need increased for 4GB, static Tread Value may also be off.

    But you may be ok, by using 2.0V for the memory voltage instead of Auto or 1.8V

    Please grab a template from my signature (P35 one is fine) and give me your full specs, and current BIOS Settings in full and I will advise back. Please also tell me what BIOS you are now using, latest (F10a) is here
    GA-P31-DS3L (rev. 1.x) - GIGABYTE - Support&Download - Motherboard - BIOS


    For my reference later
    http://www.corsair.com/_datasheets/CM2X1024-5400C4.pdf
    http://www.comx-computers.co.za/ME-C...-pdf-20468.php
    Specs:

    Core 2 Quad 6600
    Gainward 8800GT 1GB
    Samsung SATA 320GB

    Thanks for the reply.

    I am using Windows 7 64-bit. Windows shows I have 4GB installed but only 3GB usable. The BIOS only shows 3GB as well.

    About the slots, I had my old RAM in slots 1+3 and the new in 2+4. However, when I did that, only 2GB was visible. The only way I could get 3GB was to put the old RAM in 1+2 and the new in 3+4.

    I've tried the RAM voltage and MCH voltage (didn't try when I put them in the other slots) but didn't try the tRFC and Tread.

    Template:

    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [9]
    Fine Clock Ratio ____________[0.5]
    CPU Host Clock Control_ [Disabled]
    CPU Host Frequency (MHz)__________ [266]
    PCI Express Frequency (Mhz)_______ [Auto]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [2.00]
    DRAM Timing Selectable_______ SPD __ [Manual]

    Performance Enhance = [Standard]

    CAS Latency Time________________ [4]
    Dram RAS# to CAS# Delay_________ [4]
    Dram RAS# Precharge Delay_______[4]
    Precharge Delay (tRAS)__________ [12]

    ACT to ACT Delay (tRRD)_________ [2]
    Rank Write to READ Delay________ [2]
    Write to Precharge Delay_________ [4]
    Refresh to ACT Delay______________ [34]
    Read to Precharge Delay__________[2]
    Static tRead Value_______________[10]
    Static tRead Phase Adjust________ [Auto] [0]

    System Voltage Control____ [Auto]
    DDR2 OverVoltage Control__ [Normal]
    PCI-E OverVoltage Control_ [Normal]
    FSB OverVoltage Control___ [Normal]
    (G)MCH OverVoltage Control [Normal]
    CPU Voltage Control_______ [1.25]

    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___________________[Disabled]
    Last edited by LordKi; 05-06-2010 at 05:44 PM.

  4. #4
    Lsdmeasap's Avatar
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    Default Re: GA-P31-DS3L Memory Upgrade Problem

    Alrighty, please try these settings, with the memory kits in the correct slots, 1+3 for one kit, 2+4 for the other.

    It very well could be this is not going to work, due to mixed memory, or one of the sets is not fully compatible. But we will try

    What CPU are you using, and what BIOS version?


    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [9]
    Fine Clock Ratio ____________[0.5]
    CPU Host Clock Control_ [Disabled]
    CPU Host Frequency (MHz)__________ [266]
    PCI Express Frequency (Mhz)_______ [Auto]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [2.00] << 2.50A
    DRAM Timing Selectable_______ SPD __ [Manual]

    Performance Enhance = [Standard]

    CAS Latency Time________________ 5
    Dram RAS# to CAS# Delay_________ 5
    Dram RAS# Precharge Delay_______5
    Precharge Delay (tRAS)__________ 15

    ACT to ACT Delay (tRRD)_________2-3
    Rank Write to READ Delay________ 3-4
    Write to Precharge Delay_________4-6
    Refresh to ACT Delay______________ [34] << Too low, try 48-58
    Read to Precharge Delay__________3
    Static tRead Value_______________[10] << 8-9 should be fine
    Static tRead Phase Adjust________ [Auto] [0] << Always Auto

    System Voltage Control____ [Auto] << Manual
    DDR2 OverVoltage Control__ [Normal] << +0.2 = 2.0V
    PCI-E OverVoltage Control_ [Normal]
    FSB OverVoltage Control___ [Normal]
    (G)MCH OverVoltage Control [Normal] << +0.2 should be good
    CPU Voltage Control_______ [1.25]

    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___________________[Disabled]

  5. #5
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    Default Re: GA-P31-DS3L Memory Upgrade Problem

    CPU: Core 2 Quad 6600
    Bios: F10a

    Tried them, still only reports 2GB with those slots. Also, if I put the old RAM in the red slots the PC keeps restarting over and over.
    Last edited by LordKi; 05-06-2010 at 06:11 PM.

  6. #6
    Lsdmeasap's Avatar
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    Default Re: GA-P31-DS3L Memory Upgrade Problem

    Then is sounds like one of the kits is just not compatible is all. You will either have to run 3GB in dual channel like you were, or sell one kit and buy a matching set.

    I suggest selling both kits actually, and then buy one 800Mhz 2x2GB kit

  7. #7
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    Default Re: GA-P31-DS3L Memory Upgrade Problem

    Quote Originally Posted by Lsdmeasap View Post
    Then is sounds like one of the kits is just not compatible is all. You will either have to run 3GB in dual channel like you were, or sell one kit and buy a matching set.

    I suggest selling both kits actually, and then buy one 800Mhz 2x2GB kit
    Thanks for the help and suggestion

    I'll see what I can do.

  8. #8
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    Default Re: GA-P31-DS3L Memory Upgrade Problem

    Sorry I can't help you get it going, but it just seems it is not compatible because the above settings should work no problem if it was.

    Mixing memory is always a hassle

  9. #9
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    Default Re: GA-P31-DS3L Memory Upgrade Problem

    Quote Originally Posted by Lsdmeasap View Post
    Sorry I can't help you get it going, but it just seems it is not compatible because the above settings should work no problem if it was.

    Mixing memory is always a hassle
    No problem, at least I learned not to ever mix memory again.

  10. #10
    Lsdmeasap's Avatar
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    Default Re: GA-P31-DS3L Memory Upgrade Problem

    Sometimes is works with some hassle, sometimes not though.

    Can you return the memory you bought and just tell them it was not compatible? If so try and see if you can get the same set you already had, if not you will need to save up and get a 2x2GB kit if you need 4GB

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