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The 32GB DIMM Is the Most Cost-Effective Way to Populate 16 Memory Channels. Here Is Why.

Buy 16x 32 GB DDR5 DIMMs for a dual-socket server and you get 512 GB across all 16 memory channels at 1DPC — full speed, no 2DPC penalty, every channel active. The total cost: roughly $4,000. Buy 16x 64 GB DIMMs for 1 TB instead, and the cost jumps to roughly $8,000 — double the money for double the capacity, but the same number of channels and the same 1DPC speed. The SK hynix 32 GB DDR5-4800 ECC RDIMM is the DIMM you order when you need full channel population, full memory bandwidth, and enough capacity for the workload — without overpaying for capacity you will not use.

Spécifications techniques

Paramètre	spécification
Capacité	32 Go pour DIMM
Taper	DDR5 SDRAM, Registered (RDIMM), CCE
Vitesse	4800 MT/s (PC5-38400)
CAS Latency	CL40 (CL40-39-39 at 4800 MT/s)
Organization	1Rx8 (single-rank, x8 DRAM devices) or 2Rx8 (dual-rank, depending on SKU)
Tension	1.1V VDD, 1.8V VPP
DRAM Process	SK hynix 1a-class (14nm) DDR5 DRAM
On-Die ECC	Oui (DDR5 standard — per-subchannel error correction)
Sideband ECC	Oui (standard ECC across data bus)
Temperature Sensor	Integrated SPD thermal sensor (I2C, read by iDRAC/iBMC)
PMIC	On-DIMM Power Management IC (DDR5 standard)
Facteur de forme	288-pin DDR5 RDIMM, standard height (31.25 millimètre)
Physical	133.35 X 31.25 millimètre, ~16g
Température	0C to 85C
Qualified Platforms (Dell)	PowerEdge R660, R760, R770, R860, R960 (4th Gen Xeon platform)
Qualified Platforms (xFusion)	Fusionserver 2288h v7, 2488H V7, 5288 V7, 5885H V7
garantie	3-année (with server)

32 GB vs 64 GB vs 128 GB — The DIMM Density Decision

Scenario	Recommended DIMM Size	Population	Total Capacity	Estimated Cost
General virtualization, 16 VMs, moderate density	32 Go	16X (1DPC, all channels)	512 Go	~$4,000
Database server, 1 TB working set	64 Go	16X (1DPC, all channels)	1 TB	~$8,000
VMware host, 100+ VMs, 2 TB needed	128 Go	16X (1DPC) or 32x 64 Go (2DPC, speed penalty)	2 TB	~$16,000
In-memory database, 4 TB needed	256 Go (3DS RDIMM)	16X (1DPC, 16 canaux)	4 TB	~$40,000

The 1DPC Speed Rule for 32 DIMM Go

One DIMM per channel at 4800 MT/s delivers full rated speed. Two DIMMs per channel drop to 4400 MT/s (3DS RDIMM) ou 4800 MT/s (standard RDIMM, platform-dependent). For a dual-socket server with 16 canaux mémoire, ordering 16x 32 GB at 1DPC gives you full bandwidth on all 16 canaux. Ordering 32x 32 GB forces 2DPC on all 16 channels — no speed penalty on standard RDIMMs at this density, but you lose the option to expand later. Leave half the slots empty if your workload fits in 512 Go; populate all 32 slots only if you need 1 TB.

Compatible Platforms

DDR5-4800 ECC RDIMM. Compatible with Dell PowerEdge R660, R760, R770, R860, R960 (4th Gen Xeon). Also compatible with xFusion FusionServer V7. Verify platform QVL before ordering. Mixing SK hynix with Samsung or Micron DIMMs on the same channel forces both to train down to the slowest common timing — order matched kits.