Dell DCDO Expansion Bus, Available devices, Serial ATA drive, floppy drive, media card reader

Expansion Bus
Bus type	PCI 32-bit
	PCI Express x1 and x16
Bus speed	PCI: 33 MHz
Bus throughput	PCI Express:
	x1 slot bidirectional speed — 2.5
	Gbps
	x16 slot bidirectional speed — 40
	Gbps
PCI
connector	three
connector size	124 pins
connector data width (maximum)	32 bits
PCI Express	NOTE: If a graphics card is installed in
	each of the PCI Express x16 card slots in
	the dual-graphics configuration, the PCI
	Express x1 card slot is not accessible for
	use.
connector	one x1
connector size	36 pins
connector data width (maximum)	1 PCI Express lane
PCI Express
connector	one x8
connector size	98 pins
connector data width (maximum)	4 PCI Express lanes
PCI Express
connector	two x16
connector size	164 pins
connector data width (maximum)	16 PCI Express lanes
Drives
Available devices	Serial ATA drive, floppy drive,
	memory devices, DVD drive, DVD-RW
	drive, CD-RW/DVD combo drive, and
	media card reader
Externally accessible:	two 3.5-inch drive bays
	four 5.25-inch drive bays
Internally accessible:	four 3.5-inch drive bays for hard drives
Connectors
External connectors:
IEEE 1394	front and back-panel 6-pin serial
	connectors