How to Get Total Amount of Ram the Computer Has

How do you get total amount of RAM the computer has?

The Windows API function GlobalMemoryStatusEx can be called with p/invoke:

  [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
  private class MEMORYSTATUSEX
  {
     public uint dwLength;
     public uint dwMemoryLoad;
     public ulong ullTotalPhys;
     public ulong ullAvailPhys;
     public ulong ullTotalPageFile;
     public ulong ullAvailPageFile;
     public ulong ullTotalVirtual;
     public ulong ullAvailVirtual;
     public ulong ullAvailExtendedVirtual;
     public MEMORYSTATUSEX()
     {
        this.dwLength = (uint)Marshal.SizeOf(typeof(NativeMethods.MEMORYSTATUSEX));
     }
  }


  [return: MarshalAs(UnmanagedType.Bool)]
  [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
  static extern bool GlobalMemoryStatusEx([In, Out] MEMORYSTATUSEX lpBuffer);

Then use like:

ulong installedMemory;
MEMORYSTATUSEX memStatus = new MEMORYSTATUSEX();
if( GlobalMemoryStatusEx( memStatus))
{ 
   installedMemory = memStatus.ullTotalPhys;
}

Or you can use WMI (managed but slower) to query TotalPhysicalMemory in the Win32_ComputerSystem class.

Get total installed RAM in C# on Windows 10

The TotalPhysicalMemory is expressed in bytes.
If you want the memory to be converted to GB use this sample:

Convert.ToInt32(InstalledRam/(1024*1024*1024));

Retrieving Total amount of RAM on a computer

This information is already available directly in the .NET framework, you might as well use it. Project + Add Reference, select Microsoft.VisualBasic.

using System;

class Program {
    static void Main(string[] args) {
        Console.WriteLine("You have {0} bytes of RAM",
            new Microsoft.VisualBasic.Devices.ComputerInfo().TotalPhysicalMemory);
        Console.ReadLine();
    }
}

And no, it doesn't turn your C# code into vb.net.

How I can get the installed RAM and CPU details c# .Net Core?

Looks like you're using the wrong class. Try the Win32_PhysicalMemory class and the Capacity property

var query = "SELECT Capacity FROM Win32_PhysicalMemory";
var searcher = new ManagementObjectSearcher(query);
foreach (var WniPART in searcher.Get())
{
    var capacity = Convert.ToUInt64(WniPART.Properties["Capacity"].Value);
    var capacityKB = capacity / 1024;
    var capacityMB = capacityKB / 1024;
    var capacityGB = capacityMB / 1024;
    System.Console.WriteLine("Size in KB: {0}, Size in MB: {1}, Size in GB: {2}", capacityKB, capacityMB, capacityGB);
}

The MaxCapacity property in the Win32_PhysicalMemoryArray class will give you the maximum amount of RAM installable on your machine, not the amount of memory that is actually installed.

How to know the total amount of RAM of a computer?

With Node.js OS package you can do this and much more.


Take a look in os.freemem or os.totalmem

From Node.js documentation:

os.freemem()

Returns the amount of free system memory in bytes.

os.totalmem()

Returns the total amount of system memory in bytes.

How to get total memory/RAM in GO?

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