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HP Compaq dx7300 Business PC
Configurable Components
DA – 12583 EMEA • Version 1 • September 18, 2006 Page 6
Memory DDR2 SYNCH DRAM NON-ECC MEMORY
Memory upgrades are accomplished by adding single or multiple DIMMs of the same or varied sizes.
This chart does not represent all possible memory configurations. The Intel Q965 Express chipsets
support non-ECC DDR2 PC2-5300 (667-MHz) and PC2-6400 (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.
Microtower
Maximum Memory* 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: Above 3-GB, all memory may not be available due to system resource requirements.
DIMM Size Slot
Channel A Channel B
1 (black) 2 (white) 3 (white) 4 (white)
512-MB 512-MB
512-MB (dual-channel
symmetric)
256-MB 256-MB
1-GB 1-GB
1-GB (dual-channel
symmetric)
512-MB 512-MB
1-GB (dual-channel
symmetric)
256-MB 256-MB 512-MB
2-GB (dual-channel
symmetric)
1-GB 512-MB 512-MB
2-GB (dual-channel
symmetric)
512-MB 512-MB 512-MB 512-MB
4-GB maximum
(dual-channel symmetric)
1-GB 1-GB 1-GB 1-GB
*NOTE: The Intel Q965 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, 8 MB of memory is
pre-allocated for it at system startup. If the PC contains two DIMMs, 16 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.