USDT
SFF
CMT
Memory Configurations
–
One of the following
512-MB DDR2 Synch Dram PC2-6400 (800-MHz) Non ECC (1 x 512)
X X X
1-GB DDR2 Synch Dram PC2-6400 (800-MHz) Non ECC (1 x 1GB)
X X X
2-GB DDR2 Synch Dram PC2-6400 (800-MHz) Non ECC (1 x 2GB)
X X X
2-GB DDR2 Synch Dram PC2-6400 (800-MHz) Non ECC (2 x 1GB)
X X X
3-GB DDR2 Synch Dram PC2-6400 (800-MHz) Non ECC (3 x 1GB)
X X
4-GB DDR2 Synch Dram PC2-6400 (800-MHz) Non ECC (4 x 1GB)
X X
4-GB DDR2 Synch Dram PC2-6400 (800-MHz) Non ECC (2 x 2GB)
X X X
8-GB DDR2 Synch Dram PC2-6400 (800-MHz) Non ECC (4 x 2GB)
X X
16-GB DDR2 Synch Dram PC2-6400 (800-Mhz) Non ECC (4 x 4GB)
X X
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 Worldwide QuickSpecs — Version 24 — 10/30/2009
Page 13
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