page_title: Advanced Communications Riser
hierarchical_section_title: Advanced Communications Riser
caption_attribution_description: Deutsch: Ein ACP Ports eines ASUS A7V266
context_page_description: The Advanced Communications Riser, or ACR, is a form factor and technical specification for PC motherboard expansion slots. It is meant as a supplement to PCI slots, a replacement for Audio/modem riser slots, and a competitor and alternative to Communications and Networking Riser slots.
context_section_description: The Advanced Communications Riser, or ACR, is a form factor and technical specification for PC motherboard expansion slots.  It is meant as a supplement to PCI slots, a replacement for Audio/modem riser (AMR) slots, and a competitor and alternative to Communications and Networking Riser (CNR) slots.
caption: ACR expansion slot (right), on the left 2 PCI slots
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