CNR

http://en.wikipedia.org/wiki/Communications_and_Networking_Riser


"Intel developed the CNR slot to replace its own AMR technology. Two advantages over the AMR slot it replaced are that it can be both software based (CPU-controlled) or hardware accelerated (dedicated ASIC), and that CNR is plug-and-play compatible. On some motherboards, a CNR slot replaces a PCI slot, but many motherboard manufacturers engineered boards that allow the CNR and last PCI slot to share the same space."