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Thread: Gigabyte EX58-UD5 sees only 4gb instead of 6bg




  1. #1
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    Default Gigabyte EX58-UD5 sees only 4gb instead of 6bg

    Hi all,
    I've build a new rig (MB Gigabyte GA-EX58-UD5 + Intel i7 920 + 6Gb ram) and something weird is happening here.
    Vista 64 listes only 4Gb of ram while cpu-z sees all 6gb
    Ram is Corsair TR3X6G1333C9 (6gb)


    In the BIOS (F4R latest available) under the 'Standard CMOS features' menu there is listed only 4096mb of Ram but under the M.I.T. menu I can access all three modules (timing, voltage...)

    Can this be a BIOS bug?

    you can see here what i mean:



    Thanks in advance to anyone that have any clue.

    Stefano

  2. #2
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    Default Re: Gigabyte EX58-UD5 sees only 4gb instead of 6bg

    Have you installed Vista 64 Service Pack 1?
    GA-P35C-DS3R Rev2.0 F11 bios, E8200 (@3.0Ghz), OCZ DDR3 PC3-10666 Reaper 4GB (@1200Mhz), Xonar D1, 8800GTS 512, Corsair HX520 (Single 12volt line, Max 40A), WDC 3200aaks/5000aaks in AHCI mode, Vista 64 Premium.

  3. #3
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    Default Re: Gigabyte EX58-UD5 sees only 4gb instead of 6bg

    Quote Originally Posted by VorLonUK View Post
    Have you installed Vista 64 Service Pack 1?
    Hi VorLonUK,
    thanks for your reply and yes, sp1 is installed. I've done further testing and I think have a defective mb...
    I've switched the ram sticks each other and discovered that if slot 1 and 3 are plugged (slot 5 free) I see only 2gb of ram, if slot 3 and 5 are plugged (slot 1 free) I see 4gb...
    So ram slot 1 is defective...
    Still wondering why cpu-z recognizes all 3 channels.

  4. #4
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    Default Re: Gigabyte EX58-UD5 sees only 4gb instead of 6bg

    Have you checked the memory options on page 16 of the PDF document (and probably handbook) for Dual and Tri channel configurations?
    GA-P35C-DS3R Rev2.0 F11 bios, E8200 (@3.0Ghz), OCZ DDR3 PC3-10666 Reaper 4GB (@1200Mhz), Xonar D1, 8800GTS 512, Corsair HX520 (Single 12volt line, Max 40A), WDC 3200aaks/5000aaks in AHCI mode, Vista 64 Premium.

  5. #5
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    Default Re: Gigabyte EX58-UD5 sees only 4gb instead of 6bg

    Quote Originally Posted by VorLonUK View Post
    Have you checked the memory options on page 16 of the PDF document (and probably handbook) for Dual and Tri channel configurations?
    Yes, I've checked that. I've a three-channel kit from corsair (XMS 3 classic TR3X6G1333C9) and the sticks are plugged in the white sockets (ddr3_1, ddr3_3, ddr3_5). I dont know what else to do...

  6. #6
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    Default Re: Gigabyte EX58-UD5 sees only 4gb instead of 6bg

    I see you have the latest bios, but I'm only seeing version F3 on the GB website. Where did you obtain that version you have? And did all the memory get detected with the previous bios version?

    Edit:-
    Well F3 appears to be the last Stable proper release and as i said on another thread, scanning through the bios Info thread, F4L seems to look reasonable. Again it is a beta Bios, but no doubt worth a try. You do need to Stop when you find a beta bios that works in the main, until a final Proper Version is released, otherwise you will be giving yourself a headache.

    F4L:-
    http://forums.tweaktown.com/f69/giga...tml#post274476
    Last edited by VorLonUK; 12-21-2008 at 11:55 PM.
    GA-P35C-DS3R Rev2.0 F11 bios, E8200 (@3.0Ghz), OCZ DDR3 PC3-10666 Reaper 4GB (@1200Mhz), Xonar D1, 8800GTS 512, Corsair HX520 (Single 12volt line, Max 40A), WDC 3200aaks/5000aaks in AHCI mode, Vista 64 Premium.

  7. #7
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    Default Re: Gigabyte EX58-UD5 sees only 4gb instead of 6bg

    Check the following thread.
    A guy with an evga X58 had a problem where he thought his third mem channel was dead (he could also only see 4gb). Turns out it was a BIOS glitch, and he posted instructions to resolve the problem.

    Third Memory Channel back from the Dead!

    P.s. This procedure seems to fix a lot of problems with these boards: S3, reboot loop.....
    Windows 7 Pro 64 | OCZ Vertex 120 | Cosmos S
    Gigabyte P67A-UD5-B3 (F6) | Enermax Revolution85+ 1050w
    i7 2600k | 2x4 GB Corsair Vengeance 1866 | EVGA GTX570 SC
    Apogee XT | Magicool 360 Radiator | MCP35x Pump + v.2 Res

  8. #8
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    Default Re: Gigabyte EX58-UD5 sees only 4gb instead of 6bg

    thanks to all who replied.
    I've tried the fix linked in the evga forum step by step but no way, I still got only 4gb of ram instead of 6gb and so I cannot use three-channel mode that is a show stopper for me... Well, I should go to rma the mobo to my local dealer

  9. Default Re: Gigabyte EX58-UD5 sees only 4gb instead of 6bg

    Quote Originally Posted by diobrando View Post
    thanks to all who replied.
    I've tried the fix linked in the evga forum step by step but no way, I still got only 4gb of ram instead of 6gb and so I cannot use three-channel mode that is a show stopper for me... Well, I should go to rma the mobo to my local dealer
    I had exact same problem as you (even the RAM brand and specs are the same). About 15 min ago I have tried that fix but with a few differences and I did solve the problem. For the record:

    Step 01. Power down system, switch off power to PSU and unplug the cable.
    Step 02. Remove all memory modules except one in slot DDR3_1 (white colored; see User's Manual, page 16)
    Step 03. CLEAR CMOS using the respective jumper (see User's Manual, page 37)
    Step 04. Plug-in PSU cable and switch on the power.
    Step 05. Start-up PC and hit DEL to enter BIOS
    Step 06. Hit F8 to run Q-Flash, follow instructions and flash BIOS to version F3.
    Step 07. Once Q-Flash is done, repeat Step 1 only.
    Step 08. Insert 2nd RAM in slot DDR3_5 (first slot from the right).
    Step 09. Repeat Steps 4-7. But this time, flash BIOS to version F4r.
    Step 10. Insert 3rd RAM in slot DDR3_3 (white colored; see User's Manual, page 16)
    Step 11. Plug-in PSU cable and switch on the power.
    Step 12. Star-up PC and logon Windows.

    That's it. Good luck. ;)



    Try this one more time. Maybe it will save yourself a lot of hassles with your Mobo local dealer.

    Cheers,

    JRook


    PS: The only problem with BIOS F4r (all F4betas for that matter) is that it reads the 1333Mhz RAM as being 1066Mhz but, we can fix it by setting up the multiplier up to 10x.
    Last edited by Johnny Rook; 12-24-2008 at 06:14 AM.

  10. #10
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    Default Re: Gigabyte EX58-UD5 sees only 4gb instead of 6bg

    Quote Originally Posted by Johnny Rook View Post
    I had exact same problem as you (even the RAM brand and specs are the same). About 15 min ago I have tried that fix but with a few differences and I did solve the problem. For the record:

    Step 01. Power down system, switch off power to PSU and unplug the cable.
    Step 02. Remove all memory modules except one in slot DDR3_1 (white colored; see User's Manual, page 16)

    JRook
    Hi JRook,
    many thanks for your help but DDR3_1 (white) is the socket that fails, pc doesn't boot-up at all following STEP 02. I've tried anything possible but cannot get it working properly so still without three-channel...
    I'm truly temped ditching my gigabyte mobo for an Asus or DFI

    Stefano

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