View source for Audio/modem riser

{{Short description|Computer expansion slot for analog functionality}}
[[File:AMR and PCI slots.gk.jpg|thumb|upright=0.65|AMR (brown, at left), with PCI slot (white, at right) for comparison]]
[[File:AMR Modem 1.jpg|thumb|right|A modem with AMR interface]]

The '''audio/modem riser''' ('''AMR''') is a [[riser card|riser]] [[expansion slot]] found on the [[motherboards]] of some [[Pentium (brand)|Pentium]] III, Pentium 4, [[Duron]], and [[Athlon]] [[personal computers]]. It was designed by [[Intel]] to interface with chipsets and provide analog functionality, such as [[sound card]]s and [[modem]]s, on an expansion card.<ref name="pcmag">{{cite magazine |url=https://www.pcmag.com/encyclopedia/term/50553/riser-card |title=Definition of Riser Card |magazine=[[PC Magazine]] |access-date=May 2, 2016 }}</ref>

==Technology==
Physically, it has two rows of 23 pins, making 46 pins total.<ref>{{cite web |url=https://www.techopedia.com/definition/4432/audio-modem-riser-amr |title=Audio Modem Riser (AMR) |website=Techopedia |access-date=May 2, 2016 }}</ref> Three drawbacks of AMR are that it eliminates one [[Peripheral Component Interconnect|PCI]] slot, it is not [[plug and play]], and it does not allow for [[Hardware acceleration|hardware accelerated]] cards (only software-based).<ref name="pcmag" />

Technologically, it has been superseded by the [[Advanced Communications Riser]] (ACR) and Intel's own [[communications and networking riser]] (CNR). However, riser technologies in general never really took off. Modems generally remained as PCI cards while audio and network interfaces were integrated on to motherboards.{{Citation needed|date=July 2021}}

==See also==
* [[Advanced Communications Riser]] (ACR)
* [[GeoPort]]
* [[Mobile Daughter Card]]

==References==
{{Reflist}}

==Further reading==
* {{cite web |title=Audio/Modem Riser Specification |version=Revision 1.01 |publisher=Intel |date=September 10, 1998 |url=https://www.infobytes.de/pages/amr.pdf }}

{{DEFAULTSORT:Audio modem riser}}
[[Category:Motherboard expansion slot]]
[[Category:Sound cards]]