Ultra-Slim Desktop - HP Compaq dc7800 Quickspecs

QuickSpecs
Standard Features and Configurable Components

Ultra-slim Desktop

Maximum Memory*
SO-DIMM Size
512-MB
1-GB
1-GB (dual channel symmetric)
2-GB (dual-channel symmetric)
4-GB maximum (dual channel
symmetric)
* The Intel Q35 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*
DIMM Size
512-MB
(800-MHz) memory.
CAUTION: You must shut down the computer and disconnect the power cord before
adding or removing memory modules. Regardless of the power-on state, voltage is
always supplied to the memory modules as long as the computer is plugged in to an
active AC outlet. Adding or removing memory modules while voltage is present may
cause irreparable damage to the memory modules or system board.
HP recommends dual-channel symmetric configurations for maximum performance.
For best performance, add the same amount of total memory to each channel and do
not mix speeds. For dual-channel symmetric performance, the total amount of memory
in each channel must be equal. If speeds are mixed, speed will default to the slowest
DIMM.
Supports up to 4 GB of DDR2 SYNCH DRAM. Slot 1 is black and must always be
populated. Not all memory configurations possible are represented below.
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.
Supports up to 8 GB of DDR2 SYNCH DRAM. Slot 1 is black and must always be
populated. Not all memory configurations possible are represented below.
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.
Channel A
1 (black)
512-MB
DA – 12744 HP Confidential DRAFT — Version 1 — September 5, 2007
HP Compaq dc7800 Business PC
Slot
Channel A
1 (black)
512-MB
1-GB
512-MB
1-GB
2-GB
Slot
2 (white)
HP Confidential DRAFT
Channel B
2 (white)
512-MB
1-GB
2-GB
Channel B
3 (white) 4 (white)
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