PC reading wrong DDR2 memory size

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  1. Vladimir's Avatar
    Posts : 696
    Windows 10 Build 14267
       #1

    PC reading wrong DDR2 memory size


    Hi,

    I've recently replaced a defective memory stick in one of my PCs and now it is reading memory size wrongly. The mobo is a POS-MIQ35AF (skt 775), CPU is a C2Q 9550 (2.83 GHz) and I have 4x2GB Kingston KVR DDR2 modules. Instead of reading 8192 MB it's reading 8064 MB. When I left only 2 sticks it reads 4032 MB... The system is working normally with no BSODs, but it's quite wired...

    What may be causing that?

    Last edited by Vladimir; 21 Apr 2015 at 08:15.
      My Computer

  2. Dude's Avatar
    Posts : 15,147
    Windows 10 Pro X64
       #2

    What does it show in resource monitor under memory tab? It may be subtracting hardware reserved.
    Last edited by Dude; 21 Apr 2015 at 01:44.
      My Computers

  3. swarfega's Avatar
    Posts : 7,143
    Windows 10 Pro 64-bit
       #3

    Sometimes graphics cards use a small part of memory.
      My Computers

  4. Vladimir's Avatar
    Posts : 696
    Windows 10 Build 14267
    Thread Starter
       #4

    What does it show in resource monitor under memory tab? It may be subtracting hardware reserved.
    Sometimes graphics cards use a small part of memory.
    Yes, I know, but BIOS shows incorrect memory size before loading anything else...

    ~edit~

    What is interesting is that I ran extended memory test for hours without a single error...

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  5. Mystere's Avatar
    Posts : 3,256
    Windows 10 Pro
       #5

    Vladimir said:
    Yes, I know, but BIOS shows incorrect memory size before loading anything else...

    ~edit~

    What is interesting is that I ran extended memory test for hours without a single error...

    Yes, BIOS reports the memory without the memory used by the graphics card. Check your bios for the size reserved by the internal graphics.
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  6. Vladimir's Avatar
    Posts : 696
    Windows 10 Build 14267
    Thread Starter
       #6

    Mystere said:
    Yes, BIOS reports the memory without the memory used by the graphics card. Check your bios for the size reserved by the internal graphics.
    I'm using a discrete graphics card. The integrated graphic chip is disabled. Go figure...

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  7. Dude's Avatar
    Posts : 15,147
    Windows 10 Pro X64
       #7

    Also try checking maximum memory setting. +R msconfig, on boot tab click advanced and make sure maximum memory is unchecked
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  8. Vladimir's Avatar
    Posts : 696
    Windows 10 Build 14267
    Thread Starter
       #8

    Thanks you all.

    I've just found my missing 128MB of memory. It's shown as hardware reserved in Resource Monitor, but I don't think it's related to video, it's something else... Anyway it's curious that BIOS reports it without the reserved memory.

    :)
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  9. Dude's Avatar
    Posts : 15,147
    Windows 10 Pro X64
       #9

    Glad you figured it out. Hardware reserved can be a graphics card, sound card or other things.

    Enter +R, then enter "devmgmt.msc" without quotes, select Resources by Connection in the View Menu, and expand the Memory node

    My source for this is
    Blogs - Mark's Blog - Site Home - TechNet Blogs
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  10. Williams's Avatar
    Posts : 108
    windows 8.1
       #10

    do you run any virtual machines? My win 10 virtual installation reserves that 128 MB for video memory. And i also have a Sapphire Radeon R7 260x discrete gpu.
      My Computer


 
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