Run this command from shell

$ dmidecode -q | less

OR

$ /usr/local/sbin/dmidecode -q | less

To install dmidecode:

$ wget http://download.savannah.gnu.org/releases/dmidecode/dmidecode-2.10.tar.gz

$ tar xzvf dmidecode-2.10.tar.gz ; cd dmidecode-2.10

$ make ; make install