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Support for up to 4096 MB* of 533- or 667-MHz DDR2 SDRAM
Two DIMM slots
DIMM sizes supported: 256 MB, 512 MB, 1024 MB, and 2048 MB
Standard Memory
Standard MemoryStandard Memory
Standard Memory
256 MB (256 MB x 1)
512 MB (512 MB x 1 or 256 MB x 2)
1024 MB (1024 MB x 1 or 512 MB x 2)
2048 MB (1024 MB x 2)
Optional Memory
Optional MemoryOptional Memory
Optional Memory
Upgrades
UpgradesUpgrades
Upgrades
Support for up to 4096 MB* of memory is available (with the installation of optional DDR2 SDRAM
memory kits). 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
768 MB 512 MB 256 MB
1024 MB 1024 MB
Empty
1024 MB
512 MB 512 MB
1280 MB 1024 MB
256 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.
Memory Upgrades
Memory UpgradesMemory Upgrades
Memory Upgrades
256-MB 533-MHz DDR2 SDRAM
PE830A
512-MB 533-MHz DDR2 SDRAM
PE831A
1024-MB 533-MHz DDR2 SDRAM
PE832A
512-MB 667-MHz DDR2 SDRAM
EM993AA
1024-MB 667-MHz DDR2 SDRAM
EM994AA
2048-MB 667-MHz DDR2 SDRAM
EM995AA
* Above 3-GB, all memory may not be available due to system resource requirements.
QuickSpecs
HP Compaq nc6400 Notebook PC
HP Compaq nc6400 Notebook PCHP Compaq nc6400 Notebook PC
HP Compaq nc6400 Notebook PC
Memory
DA - 12446 Worldwide — Version 17 — August 10, 2007
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