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Up to 4096 MB of 667-MHz DDR2 SDRAM
Two DIMM slots
DIMM sizes supported: 512 MB, 1024 MB, and 2048 MB
Standard Memory
Standard MemoryStandard Memory
Standard Memory
512 MB (512 MB x 1)
1024 MB (1024 MB x 1 or 512 MB x 2)
2048 MB (2048 MB x 1 or 1024 MB x 2)
Optional Memory
Optional MemoryOptional Memory
Optional Memory
Upgrades
UpgradesUpgrades
Upgrades
Both memory slots are user accessible. Please refer to the Hardware and Software Guide for installation
procedures. Maximized dual-channel performance requires SODIMMs of the same size and speed in
both memory slots.
Up to
Up toUp to
Up to
Slot 1
Slot 1Slot 1
Slot 1 Slot 2
Slot 2Slot 2
Slot 2
1024 MB 1024 MB
Empty
1024 MB
512 MB 512 MB
1536 MB 1024 MB
512 MB
2048 MB 1024 MB 1024 MB
4096 MB 2048 MB 2048 MB
NOTE:
NOTE: NOTE:
NOTE:
This chart does not represent all possible memory configurations. Due to the non-industry
standard nature of some third-party memory modules, we strongly recommend using only HP branded
memory modules to ensure compatibility. If you mix memory speeds, the system will perform at the lower
memory speed. Full availability of 4 GB of memory requires Windows Vista Business 64-bit or Linux.
With Windows 32-bit operating systems, the amount of usable memory is dependent upon your
configuration, so that above 3 GB all memory may not be available due to system resource
requirements.
Memory Upgrades
Memory UpgradesMemory Upgrades
Memory Upgrades
HP 1024-MB (DDR2 667 MHz) SODIMM
EM994AA
HP 2048-MB (DDR2 667 MHz) SODIMM
EM995AA
QuickSpecs
HP Compaq 6820s Notebook PC
HP Compaq 6820s Notebook PCHP Compaq 6820s Notebook PC
HP Compaq 6820s Notebook PC
Memory
DA - 12768 North America — Version 10 — May 8, 2008
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