Windows 10: 8 GB RAM installed but only 3.23 GB usable

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  1. Posts : 1,563
    Windows 10 Pro x64 RS 10586.586
       28 Sep 2015 #11
      My ComputerSystem Spec


  2. Posts : 6
    Windows 10 Home 64-bit
    Thread Starter
       28 Sep 2015 #12

    Antilope said: View Post
    In looking up the specs for the ram, it seems to be what is recommended for the Sony Vaio VPCF135FG judging by what others are selling as ram upgrades for it.

    But still, not being able to boot from a single stick of the 4gb ram doesn't seem right. There must be some hardware incompatibility and the laptop is only recognizing 2gb of ram from each of the 4gb simms. Why, I don't know, but that seems to be what is happening.


    CORSAIR VENGEANCE CMSX8GX3M2B1866C10 DDR3L

    DDR3L

    SO DIMM 204-pin
    1600 MHz /

    1.35 / 1.5 V


    Brand
    CORSAIR

    Series
    Vengeance Performance

    Model
    CMSX8GX3M2B1866C10

    Details

    Capacity
    8GB (2 x 4GB)

    Type
    204-Pin DDR3 SO-DIMM

    Speed
    DDR3L 1866 (PC3L 15000)

    Cas Latency
    10

    Timing
    10-10-10-32

    Voltage
    1.35V

    Multi-channel Kit
    Dual Channel Kit
    I have another spare hard disk with windows 7 loaded. I swapped it today and tried to test my new ram sticks on it but it is all the same as in Windows 10. Hence proved that there is no problem with the Windows 10 operating system.

    So, the question of compatibility gets more and more serious.
      My ComputerSystem Spec


  3. Posts : 6
    Windows 10 Home 64-bit
    Thread Starter
       28 Sep 2015 #13

    vedaban said: View Post
    I have another spare hard disk with windows 7 loaded. I swapped it today and tried to test my new ram sticks on it but it is all the same as in Windows 10. Hence proved that there is no problem with the Windows 10 operating system.

    So, the question of compatibility gets more and more serious.
    I even had a discussion with CORSAIR Customer care guys, but they are damn confident about its compatibility. After asking some specific technical questions to me they confirmed that the new RAM sticks are not faulty.
    They claim that the problem lies with Windows 10 or Sony Vaio. How convenient !
      My ComputerSystem Spec


  4. Posts : 6
    Windows 10 Home 64-bit
    Thread Starter
       28 Sep 2015 #14

    Yes, I was aware of it and after I upgraded to Windows 10, there is absolutely no problem at all with my laptop. The only problem I faced was when I tried to upgrade my RAM from 4GB to 8GB. Rest, there are no issues at all.
      My ComputerSystem Spec

  5.    28 Sep 2015 #15

    A semi-random suggestion: download and run memtest86+ from a CD or USB key drive.

    Memtest86+ - Advanced Memory Diagnostic Tool

    If the RAM passes that test, that should eliminate any bad RAM or compatibility issues.
      My ComputerSystem Spec


  6. Posts : 353
    Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
       28 Sep 2015 #16

    Did you do a bios reset after changing the RAM ?
    I always do a bios reset after making a hardware change.
      My ComputerSystem Spec

  7.    30 Sep 2015 #17

    Check in the BIOS if there is a setting for memory called "memory hole remapping" or "memory remapping" or something similar. If that is not enabled hardware reserved addresses will take away from your RAM (it remaps the RAM address space used by the hardware memory map i/o region to a higher address range).
      My ComputerSystem Spec


 
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