Powershell - Server Memory

Get-WmiObject -Class Win32_OperatingSystem -ComputerName $servername |
Select-Object @{Name="TotalVisibleMemorySize (GB)";Expression={"{0:N1}" 

-f (($_.TotalVisibleMemorySize)/1024/1024)}},
@{Name="FreePhysicalMemory (GB)";Expression={"{0:N1}" 

-f (($_.FreePhysicalMemory)/1024/1024)}},
@{Name="MemoryUsage %";Expression={ "{0:N2}" 

-f ((($_.TotalVisibleMemorySize - $_.FreePhysicalMemory)*100)/ 

$_.TotalVisibleMemorySize) }} |
Format-List