IBM x3850 X6 Planning And Implementation Manual page 90

This new and innovative technology brings storage electrically closer to the processor
subsystem, thereby improving performance considerably.
Table 3-8 shows the available IBM eXFlash DIMM options.
Table 3-8 IBM eXFlash Memory Channel Storage options
Part
number
00FE000
00FE005
IBM eXFlash DIMM modules are installed in the same DIMM slots on the Compute Book as
regular DDR3 DIMMs. Figure 3-17 shows one eXFlash DIMM installed with RDIMMs in the
Compute Book.
Figure 3-17 IBM eXFlash DIMM installed in the Compute Book
The following rules apply when building a server configuration with eXFlash DIMMs:
The 200 GB and 400 GB eXFlash DIMMs cannot be mixed.
Performance memory mode must be selected; RAS (Lockstep) memory mode is not
supported.
Only RDIMMs are supported with eXFlash DIMMs; LRDIMMs are not supported.
Maximum quantities of eXFlash DIMMs in an x3850 X6 are as follows:
– 1 processor: 8 eXFlash DIMMs
– 2 processors: 16 eXFlash DIMMs
– 4 processors: 32 eXFlash DIMMs
Maximum quantities of eXFlash DIMMs in an x3950 X6 are as follows:
– 4 processors: 16 eXFlash DIMMs
– 6 processors: 24 eXFlash DIMMs
– 8 processors: 32 eXFlash DIMMs
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IBM System x3850 X6 and x3950 X6 Planning and Implementation Guide
Feature Name and description
code
A4GX IBM eXFlash 200GB DDR3 Storage DIMM
A4GY IBM eXFlash 400GB DDR3 Storage DIMM
Maximum Maximum
supported supported
x3850 X6 x3950 X6
32 32
32 32