Powershell Tip #121: Get total RAM installed By powershellgu | October 23, 2016 0 Comment Tip: You can get the total size amount of RAM installed. PowerShell [Math]::Round((Get-WmiObject -Class Win32_ComputerSystem).TotalPhysicalMemory/1GB) 1 [Math]::Round((Get-WmiObject -Class Win32_ComputerSystem).TotalPhysicalMemory/1GB)