5-12 IBM Personal Computer User GuideExpansion slots. There are three expansion slots on the system boardfor the installation of adapter cards that conform to Peripheral ComponentInterconnect (PCI) specifications. These cards are commonly referred toas PCI adapter cards.System board.Bay 3. This drive bay can accommodate a 3.5-inch slim IDE hard disk. Inmany models, this bay holds a factory-installed hard disk drive.Switching power supply. The system comes with a switching powersupplyBay 2. This drive bay can accommodate a 5.25-inch device, such as a5.25-inch diskette drive, CD-ROM drive, or DVD-ROM drive. You can alsoinstall a 3.5-inch to 5.25-inch installation kit.Bay 1. This drive bay can accommodate a 5.25-inch half-high drive suchas a diskette, hard disk, tape, or CD-ROM. In many models, this bay holdsa factory-installed CD-ROM drive.123456
