Datasheet

IBM Flex System x220 Compute Node 11
Table 4. Maximum memory speeds (Part 2: RDIMMs)
Spec RDIMMs
Rank Single rank Dual rank Quad rank
Part numbers 49Y1406 (4 GB) 49Y1559 (4
GB)
49Y1407 (4 GB)
49Y1397 (8 GB)
49Y1563 (16 GB)
90Y3178 (4 GB)
90Y3109 (8 GB)
00D4968 (16 GB)
49Y1400 (16 GB)
Rated speed 1333 MHz 1600 MHz 1333 MHz 1600 MHz 1066 MHz
Rated voltage 1.35 V 1.5 V 1.35 V 1.5 V 1.35 V
Operating
voltage
1.35 V 1.5 V 1.5 V 1.35 V 1.5 V 1.5 V 1.35 V 1.5 V
Max quantity* 12 12 12 12 12 12 12 12
Largest DIMM 4 GB 4 GB 4 GB 16 GB 16 GB 16 GB 16 GB 16 GB
Max memory
capacity
48 GB 48 GB 48 GB 192 GB 192 GB 192 GB 192 GB 192 GB
Max memory
at rated speed
48 GB 48 GB 48 GB 129 GB 192 GB 192 GB N/A N/A
Maximum operating speed (MHz)
1 DIMM
per channel
1333 MHz 1333 MHz 1600 MHz 1333 MHz 1333 MHz 1600 MHz 800 MHz 800 MHz
2 DIMMs
per channel
1333 MHz 1333 MHz 1600 MHz 1333 MHz 1333 MHz 1600 MHz 800 MHz 800 MHz
* The maximum quantity supported is shown for two processors installed. When one processor is installed, the
maximum quantity supported is half of that shown.
The following memory protection technologies are supported:
ECC

Chipkill (for x4-based memory DIMMs; look for "x4" in the DIMM description)

Memory mirroring

Memory sparing

If memory mirroring is used, then DIMMs must be installed in pairs (minimum of one pair per processor),
and both DIMMs in a pair must be identical in type and size.
If memory rank sparing is used, then a minimum of one quad-rank DIMM or two single-rank or dual-rank
DIMMs must be installed per populated channel (the DIMMs do not need to be identical). In rank sparing
mode, one rank of a DIMM in each populated channel is reserved as spare memory. The size of a rank
varies depending on the DIMMs installed.