Windows 7 could be better at this, it tells everything about the computer CPU but only the Memory amount

Microsoft should add information about DDR type, speed and maybe CL as well.
While this never happens, What's the best and easy way to check the installed memory so we can buy and upgrade it?
I was thinking a simple software so I don't need to install the full SiSoft Sandra for example, just looking for something small, only for the memory part.