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4gb memory installed but less memory size detected

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You probably have a 32 bit operating system. If so, then you will only see anywhere from 2.75 to 3.5gb of ram.

You need a 64bit operating system to fully see all 4gb of ram.

As long as you can see all 4gb of ram in bios, then you're ok.

Posted on Aug 12, 2008

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My pc wont boot up, led's 3&4 flash, I have renewed the RAM and the fault is still there, does anyone have a clue what the problem is?


Allan Cairnduff,
Below is the information for the 3,4 diag error.
Memory modules are detected, but a memory failure has occurred.
  • If two or more memory modules are installed, remove the modules (see your service manual), then reinstall one module (see your service manual and restart the computer. If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error.
  • If available, install working memory of the same type into your computer.
  • The memory specs for this computer are listed below.
  • Type DDR3 Synch DRAM Non-ECC Memory Memory Speed 1333MHz Memory Connectors Four (MT, DT, SFF), Two (USFF) Memory capacities Up to 4GB Minimum Memory 1GB Maximum Memory 16GB(with 1333MHz speed memory)/8GB for uSFF only Memory

    The OptiPlex 790 system supports up to 16 GB of memory in the mini-tower (MT), desktop (DT), and small form factor (SFF) chassis with 64-bit operating system. The maximum memory supported in the ultra-small form factor (USFF) is 8GB. The memory speed supported is 1333MHz DDR3 memory.
    However, 32-bit operating systems can only use maximum 4GB memory address space. Certain components within the computer require address space in the 4GB range, any address space reserved for these components cannot be used by computer memory the amount of memory available to the operating system is less than 4GB.
    NOTE:
    Memory modules should be installed in pairs of matched memory size, speed, and technology. If the memory modules are not installed in matched pairs, the computer will continue to operate, but with a slight reduction in performance.
    NOTE:
    The total amount of available memory will be less than 4GB. The amount less depends on the actual system configuration. To fully utilize 4GB or more of memory requires a 64-bit enabled processor and 64-bit operating system Thank You,
  • Dell-Jesse L

May 15, 2016 | Dell OptiPlex 790 USFF

2 Answers

Memory population error for DIMM 3


if there are 4 ram slots you have to pair them up or have only 1 mems stick

Aug 26, 2014 | Dell OPTIPLEX 980 SFF Desktop Computer...

1 Answer

Alienware m17x physical memory


Does it have multiple sticks of RAM or just one?
Does it show 4GB in the BIOS?
Have you tried CPUZ to see what it says your physical RAM size is?
Is your system RAM shared with the onboard video?

Nov 04, 2013 | Alienware PC Systems PC Desktops

1 Answer

How do i install 4gb sandisk memory card on my labtop


No need to install, put it in card reader and attach the card reader to the system. It would automatically detect and install the necessary drivers.

Jul 28, 2011 | PC Desktops

2 Answers

Hp xw9300 workstation bios shows 4gb of installed ram but the system properties when the pc is booted up only show 2gb of ram. Whats the fix for this?


If you running a 32 bit version Operating system it does happen. since there's a limit for 32 bit operation though the mother board can handle 4gb.
other common cases: 1 of the sticks are bad. try to reseat the memory sticks to isolate which ram is not detected.thanks

Jan 14, 2011 | HP xw9300 Workstation PC Desktop

1 Answer

Want to add memory all 4 spots are used


If all of your memory slots are used, you will need to remove the memory that is currently installed in order to increase your RAM. It appears that the T180s were originally configured with 256MB, but they are expandable to 4GB. If there are 4 slots (I couldn't find any documentation with images), you can use a maximum size of 1GB modules for each slot. Just remember that if you are using a 32-bit operating system and you upgrade to 4GB of RAM, you will not be able to use all 4GB. The BIOS will report 4GB RAM, but the operating system will only see approximately 3.4GB.

Jun 07, 2009 | Acer Aspire™ T180 PC Desktop

3 Answers

What type of memory is needed for Compaq Presario SR1110NX?


Memory expansion 4 Sockets / 400Mhz DDR
Max minne 4GB Memory std. 256MB-1 GB (Removable) MODULES MUST BE ORDERED AND INSTALLED IN PAIRS for Dual Channel mode. If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation). Models with "-b" are bundled with monitors.

May 28, 2009 | HP Compaq Presario SR1110NX PC Desktop

1 Answer

How much can i increase memory on a HP Pavlion a6240a. at moment 1024MB DDR2 320GB 3G hard drive, can i go to 4MB. 2x 2MB ? Bruce Hesketh


Yes, you can go till 4GB

Pavilion a6240a

Type of System: Desktops/Servers
Bus Architecture: PCI/PCI Express/USB
CPU Type: 1.8 GHz Intel Pentium Dual Core

System Memory
Standard Memory: 1 GB (Removable)
Maximum Memory: 4 GB
Modules must be installed in pairs for Dual Channel mode.
Maximum addressable memory may be less than the physical memory installed.

System Memory

256MB Memory (PC2-5300) 396519-001, PX974AA, PX974AT
512MB Module (PC2-5300) 396520-001, EK477-69001, PX975AA, PX975AT
1GB Module (PC2-5300) 398038-001, PX976AA, PX976AT

Oct 03, 2008 | HP PC Desktops

2 Answers

I have an ACER ASPIRE 5720 laptop - it is less than a year old and it is showing the memory is full - the memory is meant to be 32 GB and from what I can see from the programme menus there is less than 4...


Hi j0shuatsb,
Acer like many other manufactures seem to design their system to fail or have issues just after their 1 year warranty is up. Like other Microsoft windows operating systems, when you receive an error message that you're memory is full. This does not mean you have run out of RAM = memory. You're notebook can only run a max of 4GB of memory. The error message refers to hard disk drive space. Depending on you're operating system, windows will lock out so much drive space so it can move about. All notebooks also have a hidden partition which holds drivers & programs used in combination for running the system restore.
This hidden partition can range in size from 2GB up to 4GB.
This also lessens you're total hard disk drive space. Bottom line is there is nothing wrong with your memory.
What you need is a larger hard disk drive. Notice the Technical specifications from this link:
http://www.acer.co.uk/public/page9.do?sp=page4&dau34.oid=24360&UserCtxParam=0&GroupCtxParam=0&dctx1=17&CountryISOCtxParam=UK&LanguageISOCtxParam=en&ctx3=-1&ctx4=United+Kingdom&crc=512458878
It does not show what size you're SATA hard disk drive is.
Since you are still in warranty, now would be the time to increase you're drive size. On another note, if you're HDD is the standard 160GB than there is an issue with your current HDD.
Please run a full system virus scan.
Suggest you back up all you're personal data on to a DVD & run you're system restore CD including a format to help you regain you're HDD full space. A temporary fix would be to uninstall any non needed programs through Add/Remove programs. This should free up some space. Many Acer programs you do not use at all or need should be the first to go.

Mike

Aug 08, 2008 | Acer PC Desktops

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