Product guide

IBM Flex System x240 Compute Node (E5-2600) 12
Table 6. Maximum memory speeds (Part 2 - Single and Dual rank RDIMMs)
Specification RDIMMs
Rank Single rank Dual rank
Part numbers 49Y1405 (2GB)
49Y1406 (4GB)
49Y1559
(4GB)
49Y1407 (4GB)
49Y1397 (8GB)
49Y1563 (16GB)
90Y3178 (4GB)
90Y3109 (8GB)
00D4968
(16GB)
Rated speed 1333 MHz 1600 MHz 1333 MHz 1600 MHz
Rated voltage 1.35 V 1.5 V 1.35 V 1.5 V
Operating
voltage
1.35 V 1.5 V 1.5 V 1.35 V 1.5 V 1.5 V
Max quantity* 16 24 24 16 24 24
Largest DIMM 4 GB 4 GB 4 GB 16 GB 16 GB 16 GB
Max memory
capacity
64 GB 96 GB 96 GB 256 GB 384 GB 384 GB
Max memory
at rated speed
N/A 64 GB 64 GB N/A 256 GB 256 GB
Maximum operating speed (MHz)
1 DIMM per
channel
1333 MHz 1333 MHz 1600 MHz 1333 MHz 1333 MHz 1600 MHz
2 DIMMs per
channel
1333 MHz 1333 MHz 1600 MHz 1333 MHz 1333 MHz 1600 MHz
3 DIMMs per
channel
NS** 1066 MHz 1066 MHz NS** 1066 MHz 1066 MHz
* The maximum quantity that is supported is shown for two processors installed. When one processor is installed,
the maximum quantity that is supported is half of that shown.
** NS = Not supported at 1.35 V. Will operate at 1.5 V instead
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 CPU), 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 being 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.