Method 1: Environment Variable

PS:\>$ENV:PROCESSOR_ARCHITECTURE

Method 2: Using Win32_OperatingSystem

ps:\>$computername=’abcd’

ps:\>(Get-WmiObject Win32_OperatingSystem -computername $computername).OSArchitecture

 Method 3: Using Win32_Processor

ps:\>$computername=’abcd’

ps:\>Get-WmiObject -Class Win32_Processor -ComputerName $ComputerName| Select-Object AddressWidth

Method 4:[IntPtr]::Size - Gets the size of this instance.  The value of this property is 4 in a 32-bit process, and 8 in a 64-bit process

ps:\>[IntPtr]::Size