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Hot!EVGA X58 SLI Ram Capacity Issues

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nighthawkrmx
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2021/08/08 17:19:06 (permalink)
CPU: i7 990x
Motherboard: Previously MSI X58A-GD65
Ram:
3x Corsair 4gb CMP12GX3M3A1600C9
3x Corsair 4gb CMP16GX3M4A1333C9
 
This computer was working well with all 24gb ram recognized in triple channel mode with the previous MSI motherboard. I recently acquired a EVGA X58 SLI for a very inexpensive price and liked the looks a bit better, so I decided to upgrade to that.
 
However, when the motherboard boots, the BIOS only shows ~16gb ram installed. Windows shows 24gb (16gb usable). CPUZ shows 24gb, but only in dual channel mode.
 
If I try removing half of the sticks, the board recognizes 12gb properly in 3 channel mode. If I install 6x2gb ram sticks it recognizes all 12gb in 3 channel mode as well.
 
I tried clearing cmos and flashing the latest bios and this did not fix the issue either.
 
What is going on here? Does the board not support more than 16gb ram? Is there something wrong with the board? Or have I overlooked something?
#1

11 Replies Related Threads

    nighthawkrmx
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/08/12 13:35:35 (permalink)
    Just an update. I believe the issue is with Windows 7 ram limitations, not the board. Not sure why the OS ram limits also limit the amount of ram shown in the bios, though.
    #2
    a213m
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/08/13 03:21:31 (permalink)
    Linus had similar issues, its not OS limitation, its BIOS settings, since your BIOS also shows 16GB.
     
    See video below, your menus will be different since you got a different board.
     


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    ZoranC
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/08/13 19:47:27 (permalink)
    I had EVGA X58 Classified3 running 24GB and showing that in both BIOS and Windows 7 for years.
    #4
    oriddlero
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/08/18 19:00:13 (permalink)
    Bios tell the OS how much RAM no the other way around.  I'm typing this on an X58 with 24GB.  X58 is very picky with ram sticks and timings over 12GB.
    #5
    nighthawkrmx
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/09/12 14:52:14 (permalink)
    Sorry, been awhile but I have revisited this.

    Windows 7 home premium has a limit of 16gb, so I figured that was the issue. Its not. I got pro and still have the same issue.

    Can't find any bios setting about a ram limit. Linus didn't fix the issue or find a setting in that video either.
    #6
    comeNtakeit
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/09/14 20:34:27 (permalink)
    Would windows 7 ultimate edition do the same or different?
    #7
    Davabled
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/09/15 11:32:09 (permalink)
    Physical Memory Limits: Windows 7
    OS version                    32-bit     64-bit
    Windows 7 Ultimate         4 GB    192 GB
    Windows 7 Enterprise      4 GB   192 GB
    Windows 7 Professional    4 GB   192 GB
    Windows 7 Home Premium4 GB    16 GB
    Windows 7 Home Basic     4 GB     8 GB
    Windows 7 Starter           2 GB    N/A
     
    Source : https://docs.microsoft.co...s-for-windows-releases
    post edited by Davabled - 2021/09/15 11:34:59
    #8
    nighthawkrmx
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/09/16 17:20:09 (permalink)
    I was running w7 64 home premium, now running w7 64 pro.

    I tried plugging in a different SSD with Win10 on it and saw the same thing in windows 10. 24gb (16gb usable)

    I have a lot of ddr3 spare and tried a completely different assortment of 6 4gb sticks and got the same result.
    #9
    Kasque
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/09/24 07:00:20 (permalink)
    i have gotten the same problem with an xeon and motherboard i bought on aliexpress. it is hard to make those things work correctly sometimes
    #10
    rjohnson11
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/10/01 10:46:05 (permalink)
    If you overtighten the CPU cooler on an X58 motherboard you will also have this issue. 

    AMD Ryzen 9 5950X,  Corsair Mp600 Pro M.2 2TB, 128GB DDR4  Crosshair VIII Hero, Asus RX 6900 XT Associate Code: H5U80QBH6BH0AXF

    #11
    nighthawkrmx
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    Re: EVGA X58 SLI Ram Capacity Issues 2021/10/02 13:43:57 (permalink)
    My cooler is a Cooler Master ML240L (V1) AIO. I tried loosening the screws a fait bit and nothing changed.

    Board works perfectly fine with 12gb ram in tri channel, but if i populate all slots it throws itself into dual channel and shows 16gb usable.
    post edited by nighthawkrmx - 2021/10/02 16:10:32
    #12
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