On freebsdhowtos a short howto is written to find out which hardware is installed in your FreeBSD machine.
From the howto:
Dmidecode is a tool or dumping a computer’s DMI (some say SMBIOS) table
contents in a human-readable format. The output contains a description of the
system’s hardware components, as well as other useful pieces of information
such as serial numbers and BIOS revision.
install it from /usr/ports/sysutils/dmidecode
just run it without any options:
|root@bsdfreaks ~ # dmidecode|
sample output (stripped):