The following configurations are not validated, supported, or recommended:
Mixing of RDIMMs and UDIMMs
Mixing memory type, size, speed, and/or rank
Mixing memory vendors
Intel® Server Board S5520UR supports six DDR3 memory channels, three per processor socket. The board has two DIMMs per channel, supporting up to 12 DIMMs with dual-processor sockets. Maximum memory capacity is 192 GB with 16 GB DIMMs.
Memory Integration Tips:
The server board supports DDR3 800, DDR3 1066, and DDR3 1333 memory technologies.
When CPU Socket 1 is empty, any DIMM memory in Channel A through Channel C is unavailable.
When CPU Socket 2 is empty, any DIMM memory in Channel D through Channel F is unavailable.