QuickSpecs

Expandability USDT SFF CMT
PCI slots N/A (1) LP (2.5”), length (6.6”)
standard;
(2) FH (4.2”), length (6.875”) via
optional riser card.
NOTE: With optional riser card,
PCIe x1 and PCIe x16 slots are not
accessible.
(3) FH (4.2"), length (10.5”)
Max power per slot N/A 25W 25W
PCI Express x16 slot (Also
functions as SDVO/ADD2
Slot)
N/A (2) LP (2.5”), length (6.6”) (2) FH (4.2”), full-length
Max power per slot N/A 35W 75W max if 1 16x slot,
35W each if both PCIe 16 slots
PCI Express x1 slot N/A (1) LP (2.5”), length (6.6”) (1) FH (4.2”), full-length
Max power per slot N/A 10W 10W
External Bays (1) Total (2) Total (4) Total
3.5” N/A (1)
unless used for a secondary hard
drive
(1)
5.25” N/A (1) 8.189” length (2) 8.189” length
(1) 5.71” length
Slimline 128w x 127d x 12.7h mm N/A N/A
Internal 2.5” HDD Bays (1) N/A N/A
Internal 3.5” HDD Bays N/A (1) for primary hard drive
NOTE: Secondary hard drive can be
installed in 3.5”
external bay if not used for
external device.
(2) dedicated for HDDs
NOTE: A third hard drive
can be installed in 3.5”
external bay if not used for
external device.
Hard Drive Controller (PCI)
Supported
Serial ATA
support for SATA 1.5-Gb/s and 3.0-Gb/s hard drives
Hard Drive and Optical SATA
Interfaces Supported
(1) Serial ATA interface (3) Serial ATA interfaces
(1) Serial ATA for eSATA
(4) Serial ATA interfaces
(1) Serial ATA for eSATA
Host Controller for SATA Advanced Host Controller Interface (AHCI) Revision 1.2. The specification includes a description of the
hardware/software interface between system software and the host controller hardware.
QuickSpecs
HP Compaq dc7900 Business PC
Standard Features and Configurable Components
DA - 13029 Canada — Version 29 — March 7, 2011 Page 14