not designed for NICs
"ntel is supporting a standard for its motherboards called AMR. It's on almost every 810 motherboard, and many 820 and recent VIA motherboards have these AMR slots. AMR means Audio Modem Riser. Its a special small slot, replacing one of the PCI or ISA slot positions. It carries analogue audio from the motherboard's AC97 codec, and some control lines. The small card which plugs into this slot carries only the bare line interface circuitry. Being on a separate card, it is easy to make a variety of versions to meet each region's local telecom standards. It should be ideal for simple CTI and modem applications."