Dell WHL, U7021 manual 116, Expansion Bus, Drives

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Expansion Bus

Bus type	PCI 2.3
	PCI Express x1 and x16
Bus speed	PCI: 33 MHz
	PCI Express:
	x1 slot bidirectional speed - 500 MB/s
	x16 slot bidirectional speed - 8 GB/s
PCI
connector	four
connector size	120 pins
connector data width (maximum)	32 bits
PCI Express
connector	one x1
connector size	36 pins
connector data width (maximum)	1 PCI Express lane
PCI Express
connector	one x16
connector size	164 pins
connector data width (maximum)	16 PCI Express lanes
Drives
Externally accessible:
	two 3.5-inch drive bays
	two 5.25-inch drive bays
Available devices	Serial ATA drive, floppy drive, memory devices, CD drive, CD-RW
	drive, DVD drive, DVD-RW drive, and DVD and CD-RW combo
	drive
Internally accessible:
	two bays for 1-inch high hard drives

116

Appendix