Please report all spam threads, posts and suspicious members. We receive spam notifications and will take immediate action!
Results 1 to 5 of 5

Thread: I've Lost My Memory




  1. #1
    Join Date
    Nov 2007
    Location
    Va. Beach VA
    Posts
    17

    Default I've Lost My Memory

    From the git-go let me acknowledge that I KNOW this issue pertains to software not hardware, but I'm guessing some of you experts out there could explain why I'm seeing what I'm seeing.

    In a nutshell, I have a 1GB memory module installed in each of the 4 memory slots available on my motherboard -- see this post's signature for the complete specs of my computer. But once my Operating System (Win XP Pro SP2 32-bit) takes over after a bootup, the OS sees barely more than 3 GB of memory. And the difference in the amount of memory seen by the OS is minuscule between having 3GB of memory installed and 4GB installed.

    I know that, due to limitations of Windows 32-bit operating systems, they cannot address a full 4GB (you can't put an address referencing location 4,000,000,000 in a 32-bit register). I've heard that some motherboards carve out an upper portion of RAM for their PCI-E controllers though I do not know if mine does this or not. So I don't expect the OS to report that a full 4 GB of RAM is available. What I don't understand is why the OS's report of the memory environment when only 3 GB RAM is almost the same as when 4 GB are installed. I've done a quick scan of the web for an answer and was surprised to find that there is a lot of theory and conjecture about this, but no definitive answer as to exactly how much memory a Windows 32-bit OS can address, and how much of that addressable memory is taken up by OS overhead.

    My questions are:
    (1) Can anyone provide feedback to the situation described?
    and
    (2) If it turns out that my PC is getting the most use it's going to get of the RAM installed, should I just remove one of the 1 GB memory modules and store it away in case one of the 3 remaining 1 GB memory modules goes bad and I need a replacement?

    I could find references to the state of my PC's memory situation in 4 different places:
    (1) the General tab when 'System' in the Control Panel is opened;
    (2) the 'Performance' tab of the 'Task Manager';
    (3) the report provided by the 'System Information' tool located in the START/Programs/Accessories/System Tools menu
    (4) the POST when the computer starts up.

    I've attached a spreadsheet detailing what each of those 4 report.

    As you can see, there is very little difference between having three 1 GB memory modules installed compared to when there are four 1 GB memory modules installed. That makes me think that only a small portion the 4th memory module gets used.

    Thanks for any insight anyone can provide.
    There are 10 kinds of people in the world; those who understand binary and those who don't.

    Mobo: GA-EP45-UD3P Rev 1.6 LGA 775, Intel P45 ATX Intel; Award modular BIOS V6.00PG
    PSU: Antec EarthWatts Model EA-500
    CPU: Intel Core2 Duo E6320 LGA 775, 1.86GHz, 4mb L2 cache, 1066 MHz FSB
    RAM: (4) 1GB Crucial Ballistix BL12864AA804.16FD3, 240-pin unbuffered DIMM 128MX64 DDR2, PC2-6400 CL4 EPP
    Graphics: PNY-Verto GeForce 8500 GT 512mb DDR2 PCI Express
    SCSI Controller: Adaptec AHA-2940/2940W PCI
    HD 1: Maxtor Diamondmax 20, 160GB, NTFS, 8mb cache, 7200 RPM, SATA II/300
    HD 2: WD Caviar SE WD1600, 1600GB SATA, NTFS, PN=WD1600JS-00MHB0
    HD 3: WD Caviar EIDE, 80GB, NTFS, with Rosewill RC-204 IDE-to-SATA mini Vertical Bridge
    CD/DVD: MadDog Lightscribe Internal DVD-RW MD18XTL1 (TSSTcorp CD/DVDW SH-S182M)
    CD: LG CD-RW CED-8120B
    Floppy + Card Reader: ULTRA All-in-One USB2.0 internal, No. 348479355B (Floppy connects to FDD plug.)
    OS: WinXP Pro SP3 (build 2600)
    Case: Antec Sonata III

  2. #2
    Chike is offline Senior Member
    Join Date
    Jun 2009
    Location
    Israel
    Posts
    6,531

    Default Re: I've Lost My Memory

    It's seems like only a small portion of the 4th 1GB is being used where in fact it is half.
    If you remove 1 GB of ram 1GB address space will operate as single channel with somewhat reduced performance.

  3. #3
    Join Date
    Nov 2007
    Location
    Va. Beach VA
    Posts
    17

    Default Re: I've Lost My Memory

    Chike:
    Good point. I guess leaving the 4th memory module in helps a little. Thanks for your reply.
    There are 10 kinds of people in the world; those who understand binary and those who don't.

    Mobo: GA-EP45-UD3P Rev 1.6 LGA 775, Intel P45 ATX Intel; Award modular BIOS V6.00PG
    PSU: Antec EarthWatts Model EA-500
    CPU: Intel Core2 Duo E6320 LGA 775, 1.86GHz, 4mb L2 cache, 1066 MHz FSB
    RAM: (4) 1GB Crucial Ballistix BL12864AA804.16FD3, 240-pin unbuffered DIMM 128MX64 DDR2, PC2-6400 CL4 EPP
    Graphics: PNY-Verto GeForce 8500 GT 512mb DDR2 PCI Express
    SCSI Controller: Adaptec AHA-2940/2940W PCI
    HD 1: Maxtor Diamondmax 20, 160GB, NTFS, 8mb cache, 7200 RPM, SATA II/300
    HD 2: WD Caviar SE WD1600, 1600GB SATA, NTFS, PN=WD1600JS-00MHB0
    HD 3: WD Caviar EIDE, 80GB, NTFS, with Rosewill RC-204 IDE-to-SATA mini Vertical Bridge
    CD/DVD: MadDog Lightscribe Internal DVD-RW MD18XTL1 (TSSTcorp CD/DVDW SH-S182M)
    CD: LG CD-RW CED-8120B
    Floppy + Card Reader: ULTRA All-in-One USB2.0 internal, No. 348479355B (Floppy connects to FDD plug.)
    OS: WinXP Pro SP3 (build 2600)
    Case: Antec Sonata III

  4. #4
    Join Date
    Nov 2008
    Location
    Florida, USA
    Posts
    90

    Default Re: I've Lost My Memory

    With Windows x86 (32 bit) all it can address is 4GB of space. Whether that space contains memory (RAM) or other hardware. So if you put in 4 GB of RAM, it will address all (about 3.25 GB) but what is needed for the other resources (hardware). If you only put in 3GB, then it will address all of it since the remaining 1gb of address space can be used for the other hardware.

    BTW, I lost most of my memory years ago I think, I can't remember ;-)
    Gigabyte GA-X79-UD5 v1.0 @ F13s
    Intel Xeon E5-2670
    Intel BXRTS2011LC Liquid-cooled LGA 2011
    64GB (8x8GB) Quad Channel G-Skill Ripjaws Z series DDR3 2133
    EVGA GTX 950 FTW 2GB
    Thermaltake Armor+
    Samsung 850 EVO 250 GB SSD
    1 x 2TB WD 2002FAEX SATA
    4 x 2TB WD 20EFRX SATA
    7 x 3TB WD 30EFRX SATA
    Seasonic X-1050 Power Supply
    ASUS RT-AC68U router
    Windows 7 Ultimate x64 SP1
    Windows 8.1 Pro x64
    Windows 10 Pro x64

  5. #5
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
    Join Date
    Dec 2008
    Location
    Tacoma, WA. [USA]
    Posts
    7,811

    Default Re: I've Lost My Memory

    FWIW, I've superimposed my w2k (32-bit) results over your document.
    With 4GB of memory, my swap-file usage is much lower than if I run with 2GB of memory.

    Keep in mind that 3,668,396 divided by 1024 = ~ 3,582.4 MB or ~3.498 GB.
    My system is running with a 1GB swap-file.

    You haven't lost your memory, it's just hard to find.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •