
Hardware options installation 30
• Of the two DIMMs in a given channel, DIMM 0 is the farthest from the processor.
• Each DIMM can have a maximum capacity of 16 GB.
• CPU speed is 800 MHz, 1067 MHz, or 1333 MHz depending on DIMM population.
• DIMM voltage is 1.5V and LV 1.35V.
• All valid DIMM configurations are supported, provided the total node power is rated below the
maximum value.
Follow these guidelines when installing DIMMs in the server:
• Install DIMMs in pairs while following the population rules listed in the following table.
• Install DIMMs in decreasing capacity with the largest DIMMs installed in the banks farthest away
from each processor.
• Use only HP DIMM part numbers listed in the server QuickSpecs.
DIMM population order
DIMM slot DIMM slot DIMM slot
Configuration 6A & 4B 2C & 5D 3E & 1F
CPU 1 1st 2nd 3rd
CPU 2 1st 2nd 3rd
The server memory protection mode is Advanced ECC memory. In Advanced ECC, the server does not
fail because of correctable memory errors. The server provides notification if the level of correctable errors
exceeds a predefined threshold rate. Advanced ECC provides additional protection over standard ECC,
because it is possible to correct certain memory errors that would otherwise be uncorrectable and result in
a server failure. For example, standard ECC can only correct single-bit memory errors, whereas
Advanced ECC can correct single-bit memory errors and multi-bit memory errors if all failed bits are on
the same DRAM device on the DIMM.
Installing DIMMs
CAUTION: For proper cooling do not operate the server without the access panel, baffles,
expansion slot covers, or blanks installed. If the server supports hot-plug components, minimize
the amount of time the access panel is open.
1. Power down the server (on page 24).
2. Remove the server from the chassis.
3. Open the DIMM slot latches.
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