Posted filed under CompTIA A+.

Source: Adopted From www.computerhope.com

Find how much RAM is installed and available in Windows 8 and 10

  1. From the Start screen or Start menu type ram
  2. Windows should return an option for “View RAM info” Arrow to this option and press enter or click it with the mouse. In the window that appears you should see how much installed memory (RAM) your computer has.
windows-8-system-properties

 

 

Note: If a memory chip is not being recognized by the computer, it will not be included in the amount of memory listed under “Installed memory (RAM)” in the System Properties window.

 

View used and available resources

To determine the amount of available system resources, including memory, as well as what is currently being utilized, open the Task Manager. On the Processes tab, you can see which programs are running and using resources. On the Performance tab, you can see an overall picture of all the system resources. You can see how much memory is available next to the Available label.

 

Find how much RAM is installed and available in Windows Vista and 7

  • From the Desktop or Start Menu, right-click on Computer and select Properties.
  • In the System Properties window, the system will list “Installed memory (RAM)” with the total amount detected. For example, in the picture below, there is 4 GB of memory installed in the computer.
windows-7-system-properties

 

Note: If a memory chip is not being recognized by the computer, it will not be included in the amount of memory listed under “Installed memory (RAM)” in the System Properties window.

or

  1. Click Start
  2. In the Search box, type “ram” without quotes and click the Show how much RAM is on this computer.

or

  • Click Start
  • Click System and Security
  • Under System, click View amount of RAM and processor speed.

View used and available resources

To determine the amount of available system resources, including memory, as well as what is currently being utilized, open the Task Manager. On the Processes tab, you can see which programs are running and using resources. On the Performance tab, you can see an overall picture of all the system resources. You can see how much memory is available next to the Available label.

 

Finding RAM information in Windows 95, 98, ME, NT4, 2000, and XP

  • Open the Control Panel
  • Double-click the Systems icon.
  • On the General tab, the amount of RAM currently installed and detected will be listed.

Note: If a memory chip is not being recognized by the computer, it will not be included in the amount of memory listed under “Installed memory (RAM)” in the System Properties window.

or

Windows 98, ME, 2000, and XP users can also run the System Information (msinfo32) program that comes pre-installed on the computer. Additional information about this program can be found on our msinfo32 definition page.

View used and available resources

To determine the amount of available system resources, including memory, as well as what is currently being utilized, open the Task Manager. On the Processes tab, you can see which programs are running and using resources. On the Performance tab, you can see an overall picture of all the system resources. You can see how much memory is available next to the Available label.

 

Find how much RAM is installed and available in Windows 3.x

Click File and then Exit Windows. Type mem at the MS-DOS prompt and press Enter.

  • See our mem command page for full information on this command.

 

Find how much RAM is installed and available in MS-DOS

Note: These instructions are for early versions of Windows and MS-DOS. If you are running a Windows command line the mem command is no longer supported.

Type mem at the MS-DOS prompt and press Enter.

Note: MS-DOS 6.2 will not accept or recognize more than 64 megabytes of RAM when typing mem.

  • See the mem command page for further information about this command.

 

Find how much RAM is installed and available with Apple computer’sapplemenu

Click “About this Mac” in the Apple menu on Mac OS X to determine how much RAM is installed on an Apple Mac computer. The picture shows an example of the Apple Menu. As can be seen in the picture, the About This Mac is the first option.

In the About This Mac window that appears you are shown how much memory your computer has.

 

Finding RAM information in Linux and Unix

Linux and Unix command line users can use top command, which displays the total memory detected by the computer, how much memory is used, and how much is free.

Using the free command also gives you an overview of memory as well as how much of the memory is being stored in the buffers.

 

Linux and Unix free command

free syntax

free [options]

 

Options

-b, –bytes Display the amount of memory in bytes.
-k, –kilo Display the amount of memory in kilobytes. This is the default.
-m, –mega Display the amount of memory in megabytes.
-g, –giga Display the amount of memory in gigabytes.
–tera Display the amount of memory in terabytes.
-h, –human Show all output fields automatically scaled to shortest three digit unit and display the units of print out. Following units are used.

B = bytes
K = kilos
M = megas
G = gigas
T = teras

If you have a petabyte of RAM or swap, the number is in terabytes and your computer is awesome.

-c, –countcount Display the result count times. Requires the -s option.
-l, –lohi Show detailed low and high memory statistics.
-o, –old Display the output in old format; the only difference being this option will disable the display of the “buffer adjusted” line.
-s, –secondsseconds Continuously display the result delay seconds apart. You may actually specify any floating point number for delay. The usleep system call is used for microsecond resolution delay times.
–si Use power of 1000 not 1024.
-t, –total Display a line showing the column totals.
–help Print help.
-V, –version Display version information.

free examples

free

Running free with no options will display a chart similar to the example below.

             total       used       free     shared    buffers     cached
Mem:       1006708     935872      70836          0     148244     346656
-/+ buffers/cache:     440972     565736
Swap:       262140     130084     132056

Tip: When using the free command the two important lines are the -/+ buffers/cache line and Swap line. If you’re wanting to get a good idea on how much free memory is available, the free section in the buffers/cache is what you should be reading. Linux will keep the contents of memory in the buffers to help having to access the same data over-and-over from the slower disk drive. If your buffers/cache free memory is low or your swap free is low a memory upgrade is necessary.

free -ms 5

The above command will display the memory in megabytes with the “s 5” telling the system to continuously poll the data and display the results.

watch free

This command is similar to the command mentioned above and uses watch to display the current memory usage.

 

 

Source: Adopted From www.computerhope.com

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