Computer Hardware Terms, Glossary and Dictionary

ACR: Advanced Communications Riser

Advanced Communications Riser (ACR) is a form factor and technical specification for PC motherboard expansion slots. It is meant as a supplement to PCI slots and a replacement for AMR slots. The ACR specification provides a lower cost method to connect certain expansion cards to a computer, with an emphasis on audio and communications devices. sound cards and modems are the most common devices to use the specification.

Related Terms

ACR: Advanced Communications Riser