DIMM Size
Slot
Channel A Channel B
1
(black)
2
(white)
3
(white)
4
(white)
512-MB
512-MB
1-GB
1-GB
1-GB
(dual-channel
symmetric)
512-MB
512-MB
2-GB
(dual-channel
symmetric)
1-GB
1-GB
2-GB
(dual-channel
symmetric)
512-MB 512-MB 512-MB 512-MB
4-GB
(dual-channel
symmetric)
1-GB 1-GB 1-GB 1-GB
8-GB maximum
(dual-channel
symmetric)
2-GB 2-GB 2-GB 2-GB
*
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 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.
Memory Configurations
– One of the following*
USDT
SFF
CMT
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
1-GB DDR2 Synch Dram PC2-6400 (800-MHz) Non ECC (2 x 512)
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
2-GB DDR2 Synch Dram PC2-6400 (800-MHz) Non ECC (4 x 512)
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
512-MB DDR2 Synch Dram PC2-5300 (667-MHz) Non ECC (1 x 512)
X X X
1-GB DDR2 Synch Dram PC2-5300 (667-MHz) Non ECC (1 x 1GB)
X X X
1-GB DDR2 Synch Dram PC2-5300 (667-MHz) Non ECC (2 x 512)
X X X
2-GB DDR2 Synch Dram PC2-5300 (667-MHz) Non ECC (1 x 2GB)
X X X
2-GB DDR2 Synch Dram PC2-5300 (667-MHz) Non ECC (2 x 1GB)
X X X
2-GB DDR2 Synch Dram PC2-5300 (667-MHz) Non ECC (4 x 512)
X X
3-GB DDR2 Synch Dram PC2-5300 (667-MHz) Non ECC (3 x 1GB)
X X
4-GB DDR2 Synch Dram PC2-5300 (667-MHz) Non ECC (4 x 1GB)
X X
4-GB DDR2 Synch Dram PC2-5300 (667-MHz) Non ECC (2 x 2GB)
X X X
8-GB DDR2 Synch Dram PC2-5300 (667-Mhz) Non ECC (4 x 2GB)
X X
* Ultra-slim Desktop uses SODIMM modules. Small Form Factor and Convertible Minitower use DIMM modules.
Expandability
USDT
SFF
CMT
QuickSpecs
HP Compaq dc7800 Business PC
Standard Features and Configurable Components
DA - 12744 Worldwide QuickSpecs — Version 13 — 12.14.2007
Page 10
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