Artesyn ATCA-7480 Installation and Use (February 2015) - Manual (Page 84)

Functional Description
ATCA-7480 Installation and Use (6806800T17A) 84
4.3 DDR4 Main Memory
The blade provides 2 CPUs which has 4 channels of independent DDR4 memory on each CPU.
On each of the eight DDR4 channels the blade provides 2 DIMMs. The latest JEDEC specification
defines a DDR4 socket with 288 pins. Registered DDR4 DIMMs are used for best performance.
Following are the DDR4 module specifications:
 DDR4-2133
 Very Low Profile
 Max 2 ranks per DIMM
 8 and 16 GByte capacity
 Standard Voltage (1.2V)
 Speed up to DDR4-2133 (PC4-2133) for 1DPC
 Speed up to DDR4-1866 (PC4-1866) for 2DPC
Supported memory features:
 RAS features supported with ECC (mirroring, x8/x4 SDDC, Sparing, Scrubbing)
 Memory Error signaling for uncorrectable errors
 Memory Error signaling for correctable memory errors
 ADR feature to support persistent memory structures in DDR3 (asynchronous DRAM
refresh)
When mixing DIMMs of different speed selections, BIOS setups the lowest speed for all
memory channels/DIMM slots on per CPU level basis.