Maximum RAM supported in Windows XP

Recently I assembled a new computer with 4GB RAM. My motherboard supports up to 8GB RAM and Widows XP supports 4GB RAM so no problem.....

But when I open the System Properties, it shows only 3.23GB of RAM. Where did the rest go? OK, I'm using onboard VGA with 256MB memory, so part of the RAM will be allocated to that and will not be shown in System Properties. But even with that there is considerable amount of RAM is missing.

4GB RAM not showing in System Properties.

I wanted to know why it is. So I did an Google search and found out this. Reason is XP uses its 32bit address space not only to address memory but also to address some other components like System ROM , APIC(s),Integrated PCI devices, such as network connectors and SCSI controllers, PCI cards , Graphics card, etc... Because of this some part of the ram may not be accessible by the operating system since it ran out of address space.

 

Reader Comments

Darn... M$ does it again... any idea if linux supported it?

I think it is same with any 32bit operating system. Found this http://ubuntuforums.org/showthread.php?p=4368422
regarding Ubuntu, it is also supporting max 3-3.5GB RAM.

Hi,

It's nothing to do with Microsoft or anything, it's just that most 32 bit OSes support a max of only 4GB of RAM, and when you have 4GB installed, it would only show part of it like it does to you now (3.x GB). That's because the missing amount is used by the OS for some internal stuff ,which I cannot quite remember.

My suggestion is that to install a 64-bit OS like XP 64-bit or my favorite Vista 64-bit, and you dont have to worry about your processor since the Core 2 Duo has an architecture based on 64-bit. Even I have Vista Ultimate 64bit installed on my Core2Duo machine, and it shows all 4GB.

Also, just let me know what your motherboard/chipset is, because there are some motherboards that have a little problem when 4GB or more is installed, even though it supports 8GB. So just let me know and I could find out if it has the problem...

Also, on 32bit OSes you can enable it to use more RAM, there's more info here about the Windows 4GB limit...

http://www.brianmadden.com/content/article/The-4GB-Windows-Memory-Limit-What-does-it-really-mean-

HAI BODY WINDOWS XP-32BIT OS's KERNAL only support 3.4 gb OF RAM. YOU INSTALL 4 GB OR INSTALL IT 8 GB TRY 64-BIT VERSION FOR IT SUPPORTS FROM 8GB/16GB FOR WINDOWS XP 64-BIT VERSION. BUT PROBLEM IS SO MANY APPLLICATION DO NOT WORK ON IT THAT APPLICATION SHOULD HAVE 64-BIT COMPABILITY. SO THINK AND THEN BUY THE 64-BIT VERSION.

PARESH SHIVDIKAR

Actually 32 Bit OS's can support more than 4 GB RAM if they are compiled to support it. The comment that Ubuntu only supports 3-3.5 GB is true only to a point. If you use the Ubuntu "generic" kernal it will only support the 3-3.5 (that's actually 4 GB minus the OS footprint), but if you use the "server" kernal it will support 64 GB (with a limit of 4 GB/processor available at any given time). I don't know for sure, but I bet this is the same for Win XP (That is, XP Server Edition will do 64 GB) as the RAM options are in the x86 architecture which Linux and Windows share.

I 've purchased a HCL u3934 (ME edition) laptop with 4GB Physical RAM , but Windows XP(SP3) as well as Vista Home Premium installed in my system shows only 2.9GB physical RAM. my question is where has 1.1 GB RAM gone.

Specifications:
Processor Intel® CoreTM2 Duo Processor T6600
- Details C2D T6600 (2.2 GHz, 800 MHz, 2 MB)
- Chipset
Intel® GM45 chipset
Memory: 4GB DDR2 memory
HDD: 320 GB SATA Hard Disk Drive SATA
ODD: DVD DL Super Multi Drive with DVD RAM Support
WLAN: Intel WLAN 5100AGN
BT/CAM: Integrated Bluetooth & 2MP Web Camera with Dual Array Internal Mic
Card Reader: 4 in 1 Card Reader (Multimedia Card (MMC) /Memory stick (MS)/Secure Digital Card/ MS-PRO),
Screen 14" Wide XGA Screen TFT with View Perfect Technology (VPT), Resolution : 1280 X 800
Graphics : Mobile Intel Graphics Media Accelerator (GMA) 4500M-HD - Inbuilt in GM45 chipset
Audio: Realtek ALC268 High Definition Audio controller (24-bit ADC & DAC)
Kbd + Touch 86 Keys Keyboard , Built-in touch pad with 2 click buttons and scroll function
Battery Life Li-ion Battery (6 cells) Approx. 03 Hrs 45 min Idle State
Weight Approx. 2.4 Kg weight without Adaptor
I/O Port PCI Exp Card Slot, 3 USB Port (2.0) with one combined with E-Sata, VGA Port ,RJ 45 - LAN Port, RJ-11 Port,External MIC Input, Audio Out
Softwares/Bundles Leaptop Companion DVD,EC2 System Recovery Utility ,10000 Gaming Hours , Sonic Ear - Gear , Microfibre LCD Protector
Warranty - Support One Year Warranty with unique 24x7x365 days helpline support from HCL



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