The motherboard provides eight slots for DIMMs. You can add a pair of memory risers, each with four DIMM slots, making a total of 16 DIMMs in the server.
The memory configuration rules for the server are as follows:
In all configurations, DIMMs must be identical (same size, same rank classification).
In base configurations, all DIMM slots on the motherboard must be fully occupied (eight DIMMs).
In upgrade configurations (16 DIMMs):
DIMM slots on the motherboard must be fully occupied.
Both memory risers must be installed, and both fully occupied.