Intel® Server Board M50CYP2SB Family Technical Product Specification
45
Note:
Intel only supports mixed DDR4 DRAM DIMM configurations as defined in the Intel DDR4 Support
Disclaimer above.
The following memory population rules apply when installing DDR4 DIMMs:
•
Mixing rules:
o
Mixing DDR4 DIMMs of different frequencies and latencies is not supported within or across
processors. If a mixed configuration is encountered, the BIOS attempts to operate at the highest
common frequency and the lowest latency possible.
o
x4 and x8 width DIMMs may be mixed in the same channel.
o
Mixing of DDR4 DIMM types (RDIMM, LRDIMM, 3DS-RDIMM, 3DS-LRDIMM) within or across
processors is not supported. This situation is a Fatal Error Halt in Memory Initialization.
•
For a single DDR4 DIMM in a dual-slot channel, populate slot 1 (blue slot).
•
For multiple DDR4 DIMMs per channel:
o
When populating a quad-rank DDR4 DIMM with a single- or dual-rank DDR4 DIMM in the same
channel, the quad-rank DDR4 DIMM must be populated farthest from the processor. Incorrect
DIMM placement results in an MRC error code. A maximum of 8 logical ranks can be used on any
one channel, as well as a maximum of 10 physical ranks loaded on a channel.
o
For RDIMM, LRDIMM, 3DS-RDIMM, and 3DS-LRDIMM, always populate DIMMs with higher
electrical loading in slot 1 (blue slot) followed by slot 2 (black slot).
•
Memory slots associated with a given processor are unavailable if the corresponding processor
socket is not populated.
•
Processor sockets are self-contained and autonomous. However, all memory subsystem support
(such as memory RAS and error management) in the BIOS Setup are applied commonly for each
installed processor.
•
For best system performance, memory must be installed in all eight channels for each installed
processor.
•
For best system performance in dual processor configurations, installed DDR4 DIMM type and
population for DDR4 DIMMs configured to CPU 1 must match DDR4 DIMM type and population
configured to CPU 0. For additional information, see
Section 4.3.3
4.3.2
Intel® Optane
™
Persistent Memory 200 Series Module Rules
All operating modes:
•
Only Intel® Optane
™
persistent memory 200 series modules are supported.
•
Intel® Optane
™
persistent memory 200 series modules of different capacities cannot be mixed within
or across processor sockets.
•
Memory slots supported by integrated memory controller 0 (memory channels A and B) of a given
processor must be populated before memory slots on other IMCs.
•
For multiple DIMMs per channel:
o
Only one
Intel® Optane™
persistent memory 200 series module is supported per memory channel.
o
Intel®
Optane™
persistent memory 200 series modules are supported in either DIMM slot when
mixed with LRDIMM or 3DS-LRDIMM.
o
Intel® Optane™
persistent memory 200 series modules are only supported in DIMM slot 2 (black
slot) when mixed with RDIMM or 3DS-RDIMM.
•
No support for SDRAM SRx8 DIMM that is populated within the same channel as the
Intel® Optane™
persistent memory 200 series module in any operating mode.
•
Ensure the same DDR4 DIMM type and capacity is used for each DDR4 + Intel® Optane™ persistent
memory 200 series module combination.
