How much RAM Domain computers have?

For querying remote Wnidows XP machines (for later OSes you will have to change a security item to allow this to work remotely):

Put a list of XP machine names in a text file, one machine per line (we'll call this myPCs.txt)

From a command prompt logged in with an account that has administrative privileges on the PCs:
for /f %x in (myPCs.txt) do wmic /node:%x computersystem get totalphysicalmemory,caption

sorry that command doesnt seem to work says /f is not recongnised as a command

looks like you left "for" off the beginning of the command line.  the actual command is "for" where "/f" is just an option to look in a file.

Retrieve and Save Hardware Information

Or
List Physical Memory Properties

Both work well or there are a few other scripts that will do similar in the MS script repo.

You can als try http://www.ocsinventory-ng.org/en/

I asked a similar Q a long time ago here, and got a great answer, and still use the script as suggested.

https://www.experts-exchange.com/questions/21523337/Script-to-capture-or-inventory-amount-of-RAM-WMI.html

- Check it out... Danny