PCI Slot 3

PCI Slot

The photo above shows what a PCI slot looks like. PCI slots can handle 64 bits of data at a time. ISA slots can only handle 32 bits of data at a time. PCI stands for "Peripheral Component Interconnect." A 64-bit PCI slot has 64 connections to the motherboard. Each connection is capable of handling 1 bit of data at a time. A 32-bit ISA slot has 32 connections to the motherboard and can handle only 32 bits of data at a time. Below is a picture of how a PCI card is installed.

Note: Older technology ISA slots were 8-bit and 16-bit. The later EISA, (or Extended ISA), slots are capable of 32-bit data transfer. Older PCI technology was 32-bit. The newer PCI technology is 64-bit.

PCI Card Installation

Below is a picture of a SCSI PCI expansion card. SCSI stands for "Small Computer Interface System." With a SCSI expansion card, you can connect up to 15 different devices to one SCSI connection. SCSI is one of the fastest data transfer interfaces available. SCSI cards are available with transfer rates from 4MB per second, up to 320 MB per second. The Ultra320 SCSI-3 interface is the fastest, with a 320MB/sec data transfer rate. Below is a picture of a PCI SCSI expansion card.