I have one (its red), whats it for?

no idea, your mobo have the normal white ones as-well?


my only guess is its just been "suggested" by the manufactures as the slot for a modem?

I think he means the CNR slot.

Intel motherboards used to have a slot specifically for modems and NICs.

Correct me if I'm wrong, but the slot is only about 3 inches long, right? If so, that's what it is.



Edit: It's similar to what I mentioned, but it's called an ACR slot. It performs the same function, just under a different name and the slot is the same size as a standard PCI slot, but reversed.


You owe me 30 seconds of laziness that I spent doing the research for this lol.

hey there

i have 4 white and 1 red, same size, read in mobo book that its a communicatiosn slot...thats all it says with no detail...socket A, not intel

Yeah, on AMD boards it's called the AMR slot.

If you notice, the slot itself looks like a reversed PCI slot.


Don't ask me why it's there... it's simply a stupid concept that they probably figured out was stupid after putting it out. lol

The slot on your board is an ACR or advanced communication Riser. It allow you to connect an ACR card. The riser cards allow you to use one PCI slot for multiple functions. There are 3 basic types of Riser Cards.

1. .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, the use of software-based codecs, lack of Plug and Play and the fact that it took up one PCI connection kept AMR from succeeding.

2. 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 offers various audio, modem and network combinations. CNR includes USB, which can be used for DSL connections. Ethernet and HomePNA connectivity is provided via the Intel LAN Connect Interface (LCI) or the Media Independent Interface (MIL). CNR takes up one PCI connection.

3.Advanced Communications Riser (ACR)
AC '97, V.92, Ethernet, HomePNA, DSL
In 2000, AMD, 3Com and others introduced the ACR card as a successor to AMR, but accelerates audio and modem functions in hardware. For audio and modem only, the ACR card can be built with an AMR connector to plug into an AMR slot. To support networking, the card uses a full PCI slot (colored blue and reversed).

ACR allows modem, HomePNA and DSL to be connected over one telephone jack. It also supports multiple Ethernet controllers using the Media Independent Interface (MIL). ACR takes up one PCI connection.

Your board only takes the ACR card, as the other 2 have different plug in configurations.

http://www.techweb.com/encyclopedia/defineterm.jhtml?term=risercard

Sorry guys,but in MSI boards only,the last pci slot is a standard pci slot.Yes,the red/orange one.MSI calls it a communication slot.Dont ask me why.I have a standard pci modem in it running fine.Yes,I am stuck with dialup here in the sticks of N.Carolina.Have pity on me.I refuse to invest in the trouble laden Direcway satellite ISP.

Jim Scarpine

Nope Sorry Jim. On your 915P the orange slot is a PCI slot. On his model if you want to take a look at it on their site, the last slot is a communications riser. You can tell because the blank spot where the slot on the card fits in is on the side closest to the edge, whereas the PCI slots have the blank spot on the inside. That's how you tell.