Dell PowerEdge R840 EMC Installation and Service Manual - Page 76
Mode-specific guidelines
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Table 13. 4 socket DCPMM configurations (continued) No. of CPUs in the Server DCPMM DRAM DRAM Populati Populati Capacit on on y (GB) DCPMM Capacit y (GB) Operati ng system Memory in Memory Mode (GB) Total Memory (GB) Total Memory per CPU (GB) Ratio DRAM to Optane Memory Require s an M or L CPU Support ed in App Direct Mode Support ed in Memory Mode 4 128 GB x 128 GB x 3,072 3,072 N/A 6,144 1,536 1 : 1 L SKU Yes No 24 24 4 512 GB x 32 GB x 768 8,192 8,192 8,960 2,240 1 : 10.7 L SKU Yes Yes 16 24 4 512 GB x 32 GB x 768 12,288 12,288 13,056 3,264 1 : 16 L SKU Yes Yes 24 24 4 512 GB x 64 GB x 1,536 8,192 8,192 9,728 2,432 1 : 5.3 L SKU Yes Yes 16 24 4 512 GB x 64 GB x 1,536 12,288 12,288 13,824 3,456 1 : 8 L SKU Yes Yes 24 24 4 512 GB x 128 GB x 3,072 12,288 12,288 15,360 3,840 1 : 4 L SKU Yes Yes 24 24 4 256 GB x 16 GB x 384 4,096 4,096 4,480 1,120 1 : 10.7 L SKU Yes Yes 16 24 4 256 GB x 16 GB x 384 6,144 6,144 6,528 1,632 1 : 16 L SKU Yes Yes 24 24 4 256 GB x 32 GB x 768 4,096 4,096 4,864 1,216 1 : 5.3 L SKU Yes Yes 16 24 4 256 GB x 32 GB x 768 6,144 6,144 6,912 1,728 1 : 8 L SKU Yes Yes 24 24 4 256 GB x 64 GB x 1,536 4,096 N/A 5,632 1,408 1 : 2.7 L SKU Yes No 16 24 4 256 GB x 64 GB x 1,536 6,144 6,144 7,680 1,920 1 : 4 L SKU Yes Yes 24 24 4 256 GB x 128 GB x 3,072 6,144 N/A 9,216 2,304 1 : 2 L SKU Yes No 24 24 NOTE: DCPMM is supported on systems with 2400 W PSU configuration. Max ambient Temperature is 30C. Max hard drive is 2.5-inches x 8. DCPMM does not support GPU configuration. DCPMM does not support NVMe hard drive. Mode-specific guidelines The configurations allowed depend on the memory mode selected in the System BIOS. 76 Installing and removing system components
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