* The Intel Q45 Express chipset includes a built-in Management Engine (ME), which allocates memory for manageability functions.
Management Engine memory is shared with system memory. If the PC contains a single DIMM, 16 MB of memory is pre-allocated for
it at system startup. If the PC contains two DIMMs, 32 MB of memory is pre-allocated. This memory is not made available to the
operating system, just as pre-allocated video memory is not available.
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CMT
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Memory Configurations –
Memory Configurations –Memory Configurations –
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
ExpandabilityExpandability
Expandability
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PCI slots
N/A
(1) LP (2.5”), length (6.6”)
standard;
(2) FH (4.2”), length (6.875”) via
optional riser card.
NOTE:
NOTE:NOTE:
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:
NOTE: NOTE:
NOTE:
Secondary hard drive can
be installed in 3.5”
external bay if not used for
external device.
(2) dedicated for HDDs
NOTE:
NOTE: NOTE:
NOTE:
A third hard drive
can be installed in 3.5”
external bay if not used for
external device.
QuickSpecs
HP Compaq dc7900 Business PC
HP Compaq dc7900 Business PCHP Compaq dc7900 Business PC
HP Compaq dc7900 Business PC
Standard Features and Configurable Components
DA - 13029 North America — Version 15 — March 30, 2009
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