What's the purpose of a CNR slot?

[LordJezo]

Most mobos seem to have them, but what are they used for?

 

[kuk]

From Intel website:

The CNR specification provides the PC Industry the opportunity to deliver a flexible and cost reduced method of implementing LAN, home networking, DSL, USB, wireless, audio and modem subsystems widely used in today's "connected PCs". The CNR Specification is an open industry specification and is supported by OEMs, IHV card manufacturers, silicon supplier and Microsoft.

CNR Sound Cards
CNR Modems
CNR NICs

They're mostly (if not entirely) targeted for OEM customers.

 

[TNTrulez]

Yes, targeted for OEM since it provides them with low cost options.

 

[lenjack]

No purpose at all....ignore it.