Dell Dimension 8300 - Manual (Page 103)

Appendix 103
Expansion Bus
Bus types PCI and AGP
Bus speed PCI: 33 MHz
AGP: 133 MHz
AGP
connector one
connector size 172 pins
connector data width (maximum) 32 bits
bus protocols 8x/4x/2x modes at 1.5 V
PCI
connectors four
connector size 120 pins
connector data width (maximum) 32 bits
Drives
Externally accessible two 3.5-inch bays
two 5.25-inch bays
Available devices ATA-66 or ATA-100 Ultra DMA hard drive, serial ATA
drive, CD drive, Zip drive, DVD drive, CD-RW drive,
DVD/CD-RW combo drive, and DVD+RW drive
Internally accessible two bays for 1-inch–high hard drives