ACR definition of ACR in the Free Online Encyclopedia.

riser card

(1) A printed circuit board for low-profile motherboards. The peripheral controller cards plug into the riser card and sit parallel with the motherboard. See low-profile motherboard.

(2) An expansion card that is used to physically extend a slot in order to make it easier to plug in the chip or card.

(3) A small PC expansion card that contains audio, modem and networking capabilities. When first introduced, it let manufacturers create custom systems for different audiences using motherboards that had none of these built-in functions. After audio and networking were built into the motherboard, risers were used for modems because they could be easily interchanged for international certification (homologation). See AC'97 and HD Audio.

Audio/Modem Riser (AMR)
AC'97 Audio, V.92 Modem
In 1998, Intel introduced software-driven audio and modem capabilities in the 46-pin AMR card as well as a Mobile Daughter Card (MDC) for portable solutions. Although motherboards were built with AMR slots, AMR offered little because it usurped a PCI connection, lacked Plug and Play and was software driven.

Communications and Networking Riser (CNR)
AC'97, V.92, Ethernet, HomePNA, USB
In 2000, Intel introduced the 30-pin CNR card, which added Plug and Play support and audio, modem and network functions. CNR included USB and took up one PCI slot. Ethernet and HomePNA connectivity was provided via the Intel LAN Connect Interface (LCI) or the Media Independent Interface (MIL).

Advanced Communications Riser (ACR)
AC'97, V.92, Ethernet, HomePNA, DSL
In 2000, AMD, 3Com and others introduced ACR to supersede AMR. Taking up one PCI slot, it accelerated audio and modem functions in hardware. For audio and modem only, it could be built with a connector to plug into an AMR slot. For networking, the card used a full PCI slot, colored blue and reversed.

ACR allowed modem, HomePNA and DSL to be connected over one telephone jack. It also supported multiple Ethernet controllers.

PC Motherboard Riser Cards

ACR cards can be designed to fit into AMR slots or PCI slots (blue and reverse from standard PCI).

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No references found	ACR Image Metrix, Philadelphia, PA, an imaging contract research organization (CRO), exceeded its goals by initiating projects for over 30 pharmaceutical, biotechnology and medical device companies through its second full year of operation. ACR IMAGE METRIX COMPLETES SUCCESSFUL 2ND YR. AS IMAGING CRO by Imaging Update The data collected from the ACR allows for comparison of TB screening practices across regions and between facilities. Integrated screening tool improves TB screening rate in HIV patients ... by Odendal, Lesley / CME: Your SA Journal of CPD Dubai: Dubai Group, a diversified financial services company of Dubai Holding, said yesterday that two Sharia-compliant companies of ACR Retakaful Holdings have been assigned a rating of A- by US-based agency AM Best. AM Best gives A-minus rating to two Dubai firms by Gulf News (United Arab Emirates)	acoustooptic modulator acoustooptical cell acoustooptical filter acoustooptical material acoustooptics ACP ACPA acph ACPI acquaintance acquiescence acquire acquired Acquired Character acquired characteristics acquired drive acquired immune deficiency syndrome acquired immunity acquired immunodeficiency syndrome acquired immunological tolerance acquisition acquisition and tracking radar acquisition tone Acquisitive Prescription Acquittal ACR Acrania acrasia Acrasiales Acrasida Acrasieae acrasin Acrasiomycota acraspedote Acratophore acre acre-foot acre-foot per day acre-ft/d acre-in. acre-inch acre-yield Acree's reaction Acres, Bob acridine acridine dye acridine orange Acridoidea acriflavine Acriflavine Hydrochloride Acrisius	acquits acquits acquittal acquittal acquittal acquittal acquittal acquittals acquittals acquittals acquittance acquittance acquittance acquittances acquittances acquittances acquitted acquitted acquitted acquitted Acquittement acquitter acquitter acquitter acquitting acquitting acquitting ACQW ACQWEB ACQWS ACR ACR 20 ACR SIG acr(o)- acr- acr- ACR-F ACR-NEMA ACR0 ACR1 ACR20 ACR50 ACRA ACRAA Acrab ACRAF Acragas acral acral Acral Acanthotic Anomaly Acral erythema Acral lentiginous melanoma Acral lick dermatitis Acral lick dermatitis Acral lick dermatitis acral mutilation syndrome acral mutilation syndrome acral mutilation syndrome acral mutilation syndrome acral pruritic nodule acral pruritic nodule

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ACR Image Metrix, Philadelphia, PA, an imaging contract research organization (CRO), exceeded its goals by initiating projects for over 30 pharmaceutical, biotechnology and medical device companies through its second full year of operation.

ACR IMAGE METRIX COMPLETES SUCCESSFUL 2ND YR. AS IMAGING CRO by Imaging Update

The data collected from the ACR allows for comparison of TB screening practices across regions and between facilities.

Integrated screening tool improves TB screening rate in HIV patients ... by Odendal, Lesley / CME: Your SA Journal of CPD

Dubai: Dubai Group, a diversified financial services company of Dubai Holding, said yesterday that two Sharia-compliant companies of ACR Retakaful Holdings have been assigned a rating of A- by US-based agency AM Best.

AM Best gives A-minus rating to two Dubai firms by Gulf News (United Arab Emirates)

riser card (redirected from ACR)

riser card
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