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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.

Технические характеристики

Параметр	Спецификация
Емкость	32 ГБ на модуль DIMM
Тип	DDR5 SDRAM, Registered (RDIMM), ЕСС
Скорость	4800 МТ/с (PC5-38400)
CAS Latency	CL40 (CL40-39-39 at 4800 МТ/с)
Organization	1Rx8 (single-rank, x8 DRAM devices) or 2Rx8 (dual-rank, depending on SKU)
Напряжение	1.1V VDD, 1.8V VPP
DRAM Process	SK hynix 1a-class (14нм) DDR5 DRAM
On-Die ECC	Да (DDR5 standard — per-subchannel error correction)
Sideband ECC	Да (standard ECC across data bus)
Temperature Sensor	Integrated SPD thermal sensor (I2C, read by iDRAC/iBMC)
PMIC	On-DIMM Power Management IC (DDR5 standard)
Фактор формы	288-pin DDR5 RDIMM, standard height (31.25 мм)
Physical	133.35 Икс 31.25 мм, ~16g
Температура	0C to 85C
Qualified Platforms (Делл)	PowerEdge R660, 760 рэндов, 770 рэндов, 860 рэндов, 960 рэндов (4th Gen Xeon platform)
Qualified Platforms (xFusion)	Fusionserver 2288H V7, 2488Х V7, 5288 V7, 5885Х V7
Гарантия	3-год (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 Виртуальные машины, moderate density	32 ГБ	16Икс (1ЦОД, all channels)	512 ГБ	~$4,000
Database server, 1 TB working set	64 ГБ	16Икс (1ЦОД, all channels)	1 ТБ	~$8,000
VMware host, 100+ Виртуальные машины, 2 TB needed	128 ГБ	16Икс (1ЦОД) or 32x 64 ГБ (2ЦОД, speed penalty)	2 ТБ	~$16,000
In-memory database, 4 TB needed	256 ГБ (3DS RDIMM)	16Икс (1ЦОД, 16 каналы)	4 ТБ	~$40,000

The 1DPC Speed Rule for 32 ГБ DIMM

One DIMM per channel at 4800 MT/s delivers full rated speed. Two DIMMs per channel drop to 4400 МТ/с (3DS RDIMM) или 4800 МТ/с (standard RDIMM, platform-dependent). For a dual-socket server with 16 каналы памяти, ordering 16x 32 GB at 1DPC gives you full bandwidth on all 16 каналы. 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 ГБ; populate all 32 slots only if you need 1 ТБ.

Compatible Platforms

DDR5-4800 ECC RDIMM. Compatible with Dell PowerEdge R660, 760 рэндов, 770 рэндов, 860 рэндов, 960 рэндов (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.