@echo off
REM list.text is a list of \\computernames, one per line
for /f %%a in (list.txt) do call :DOIT %%a
echo done
goto :eof


:DOIT
setlocal
:REM no errorchecking for the case where systeminfo cannot connect to the remote system
for /f "tokens=4,5" %%a in ('"systeminfo  /S %1 |findstr /i /C:"total physical""') do set curr=%%a %%b
Echo %1 - %curr%  >>c:\output.txt
endlocal
goto :eof