4GB (2GB Usable)

Hello everyone,
I am on Windows 7 Home Premium 64bit and I am only able to use 2GB even when 4GB has been installed. I have checked each individual stick and all seems good.



I have went into BIOS and checked the Re-mapping option.
Also looked at the Max Memory box in MSCONFIG and it is unticked. I can't seem to find why this is happening. My system is also very new, 2 weeks old.

many thanks!
4 answers Last reply
More about usable
  1. Mostly a problem associated with system reserved memory.. Perform a google search on 'system reserved memory on windows 7'.. Follow the results.. Some link will surely help.. Additionally, check this out -

    http://support.microsoft.com/kb/978610
  2. This happens for several reasons, and not knowing more my first (4) guesses {beyond the (2) you already mentioned} 1. Multiple Partitions, 2. Mix-Matched Memory, 3. Improperly Installed RAM, 4. Misconfiguration in BIOS.

    Please post your LGA 1156 MOBO and EXACT RAM part-number and/or link.

    Also, post Resource Monitor | Memory tab:


    Installation {typical}:
  3. jaquith said:
    This happens for several reasons, and not knowing more my first (4) guesses {beyond the (2) you already mentioned} 1. Multiple Partitions, 2. Mix-Matched Memory, 3. Improperly Installed RAM, 4. Misconfiguration in BIOS.

    Please post your LGA 1156 MOBO and EXACT RAM part-number and/or link.

    Also, post Resource Monitor | Memory tab:
    http://i1013.photobucket.com/albums/af254/Jaquith/RM_7PRO6GB.gif

    Installation {typical}:
    http://i1013.photobucket.com/albums/af254/Jaquith/DDR_DUAL.jpg


    Hello I am using these Kingston sticks: http://umart.com.au/newindex2.phtml?bid=4
    My mobo is: http://umart.com.au/newindex2.phtml?bid=4

  4. Those links point to nothing; so I cannot tell you if the RAM is incompatible with your MOBO.

    Before you posted the image, my initial assumption was BIOS and in particular Partitions. Q - How Many partitions and What's on them?

    Great article {refer to Meminfo} - http://blogs.technet.com/b/markrussinovich/archive/2008/07/21/3092070.aspx

    Check RAM and run 2 passes, Memtest {D/L and create a bootable CD/DVD (ISO/zip)}- http://www.memtest.org/

    A 'FREQUENT' cause is a bent CPU pin; pull the CPU and look VERY carefully for any BENT pin; if you find one then you'll need to get a jeweler's tweezer to carefully bend back. In addition, re-seat you RAM in the DIMM Slots and make certain there's no debris and they're properly seated. http://www.intel.com/support/processors/sb/CS-030850.htm

    Your BIOS 'reserves' the memory for a variety of reasons; sometimes if there's an on-board GPU {unknown - don't have MOBO info} and/or a Partition containing an OS or OSes. "IF" either is indeed the case(s): 1. Reformat HDD with (1) Partition; 2. IF you have a Dedicated GPU then in the BIOS {Disable} the on-board GPU.

    Clearly IF your OS is 32-bit ~ 0.5~0.75GB of RAM will be H/W Reserved. Compare my Resource Monitor 9MB of H/W Reserved; 64-bit.

    Good Luck!
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