IBM #EM8X 512 GB (4 X 128 GB) CDIMMs, 1600 MHz DDR4 DRAM for 9080 and 9119

IBM feature #EM8X is 512 GB (4 X 128 GB) CDIMMs, 1600 MHz DDR4 DRAM, for the Power E870 and E880 (9119-MME, 9119-MHE) and the Power E870C and E880C (9080-MME, 9080-MHE). Each memory feature code provides four physical CDIMMs, which is one memory quad, and each CDIMM is a 128 GB DDR4 CDIMM with CCIN 31EF and FRU 00VK351.

Each system node has 32 CDIMM slots, so a maximum of eight memory feature codes per system node fills every slot. Each processor has two memory controllers, each controller must have at least a pair of CDIMMs attached, and a processor can have only four or eight CDIMMs attached. All the CDIMMs connected to the same POWER8 processor must be identical, while different CDIMM sizes may be mixed between different processors in a system.

All the memory CDIMMs are capable of capacity upgrade on demand and must have a minimum of 50% of their physical capacity activated through memory activation features. The minimum installed memory for the servers is 256 GB, which requires a minimum of 128 GB active. The DDR3 counterpart with the same 4 X 128 GB layout is feature #EM8M, and the 1024 GB DDR4 option is feature #EM8Y.