Compaq dc7800 manual PCIe x1 and PCIe x16 slots are Not accessible

QuickSpecs

HP Compaq dc7800 Business PC

Standard Features and Configurable Components

PCI slots		N/A	1 low-profile (2.5"), length (6.6")	3 full-height (4.2"), length (13.4")
			standard;	standard
			2 full-height (4.2"), length
			(6.875") via optional riser card.
			NOTE: With riser card option,
			PCIe x1 and PCIe x16 slots are
			not accessible.
Max power per slot		N/A	25W	25W
PCI Express x16 slot		N/A	1 low-profile (2.5"), length (6.6")	1 full-height (4.2"), length (13.4")
(Also functions as
SDVO/ADD2 Slot)
Max power per slot		N/A	25W	75W
PCI Express x1 slot		N/A	2 low profile (2.5"), length (6.6")	2 full-height (4.2"), length (13.4")
Max power per slot		N/A	10W	10W
External Bays		1 Slimline (WxDxH):	2	4
		128 x 127 x 12.7 mm
3.5"		N/A	1	1
5.25"		N/A	1 (length 8.189")	3 (2 – length 8.189", 1 – length
				5.71")
Internal 2.5" HDD Bays		1	0	0
Internal 3.5" HDD Bays		0	1	2
Hard Drive Controller		Serial ATA (support for SATA 1.5-Gb/s and 3.0-Gb/s hard drives)
(PCI) Supported
Hard Drive and Optical		1 Serial ATA interface;	3 Serial ATA interfaces	4 Serial ATA interfaces
SATA Interfaces	1 SATA to PATA converter
Supported
Ultra-slim Desktop		Small Form Factor		Convertible Minitower

Storage – Drive Support

DA - 12744 Worldwide QuickSpecs — Version 13 — 12.14.2007 Page 11