Quickspecs, Ultra-slim desktop, Small form factor and convertible minitower – HP DC7900 User Manual

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Please refer to the HP White Paper titled "Advanced Host Controller Interface (AHCI) and Redundant
Array of Independent Disks (RAID) on HP Compaq dc7900 Business PCs" at

http://www.hp.com

for more

information and instructions.

Ultra-slim Desktop

Maximum Memory

Supports up to 8 GB of DDR2 SYNCH DRAM using SO-DIMM modules. Slot 1 is black and must always
be populated. Not all memory configurations possible are represented below.

NOTE:

NOTE: For systems configured with more than 3 GB of memory and a 32-bit operating system, all
memory may not be available due to system resource requirements.

SO-DIMM Size

Slot

Channel A

Channel B

1 (black)

2 (white)

512-MB

1-GB

2-GB

2-GB (dual-channel symmetric)

1-GB

4-GB

4-GB (dual channel symmetric)

2-GB

8-GB maximum

8-GB maximum (dual channel symmetric)

4-GB

* 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 SO-DIMM, 16 MB of memory is pre-
allocated for it at system startup. If the PC contains two SO-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.

Small Form Factor and Convertible Minitower

Maximum Memory

Supports up to 16 GB of DDR2 SYNCH DRAM using DIMM modules. Slot 1 is black and must
always be populated. Not all memory configurations possible are represented below.

NOTE:

NOTE: For systems configured with more than 3 GB of memory and a 32-bit operating system, all
memory may not be available due to system resource requirements. Addressing memory above 4
GB requires a 64-bit operating system.

DIMM Size

Slot

Channel A

Channel B

1 (black)

2 (white)

3 (white)

4 (white)

512-MB

1-GB

2-GB

2-GB (dual-channel

symmetric)

1-GB

4-GB

4-GB (dual-channel

symmetric)

1-GB

8-GB

8-GB (dual-channel

symmetric)

2-GB

16-GB maximum

(dual-channel symmetric)

4-GB

QuickSpecs

HP Compaq dc7900 Business PC

Standard Features and Configurable Components

DA - 13029 North America — Version 15 — March 30, 2009

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