Windows 10: PC reading wrong DDR2 memory size Solved

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  1. Posts : 713
    Windows 10 Build 14267
       21 Apr 2015 #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 ComputerSystem Spec


  2. Posts : 8,733
    Windows 10 Pro X64
       21 Apr 2015 #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 ComputerSystem Spec

  3.    21 Apr 2015 #3

    Sometimes graphics cards use a small part of memory.
      My ComputersSystem Spec


  4. Posts : 713
    Windows 10 Build 14267
    Thread Starter
       21 Apr 2015 #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...

      My ComputerSystem Spec

  5.    21 Apr 2015 #5

    Vladimir said: View Post
    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.
      My ComputerSystem Spec


  6. Posts : 713
    Windows 10 Build 14267
    Thread Starter
       21 Apr 2015 #6

    Mystere said: View Post
    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...

      My ComputerSystem Spec


  7. Posts : 8,733
    Windows 10 Pro X64
       21 Apr 2015 #7

    Also try checking maximum memory setting. +R msconfig, on boot tab click advanced and make sure maximum memory is unchecked
      My ComputerSystem Spec


  8. Posts : 713
    Windows 10 Build 14267
    Thread Starter
       21 Apr 2015 #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.

      My ComputerSystem Spec


  9. Posts : 8,733
    Windows 10 Pro X64
       21 Apr 2015 #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
      My ComputerSystem Spec

  10.    21 Apr 2015 #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 ComputerSystem Spec


 
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