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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.

기술 사양

매개변수	사양
용량	32 DIMM당 GB
유형	DDR5 SDRAM, Registered (RDIMM), ECC
속도	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)
전압	1.1V VDD, 1.8V VPP
DRAM Process	SK hynix 1a-class (14nm) DDR5 DRAM
On-Die ECC	예 (DDR5 standard — per-subchannel error correction)
Sideband ECC	예 (standard ECC across data bus)
Temperature Sensor	Integrated SPD thermal sensor (I2C, read by iDRAC/iBMC)
PMIC	On-DIMM Power Management IC (DDR5 standard)
폼 팩터	288-pin DDR5 RDIMM, standard height (31.25 mm)
물리적	133.35 엑스 31.25 mm, ~16g
온도	0C to 85C
Qualified Platforms (작은 골짜기)	파워엣지 R660, R760, R770, R860, R960 (4th Gen Xeon platform)
Qualified Platforms (xFusion)	Fusionserver 2288h V7, 2488H V7, 5288 V7, 5885H V7
보증	3-년도 (서버와 함께)

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

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

The 1DPC Speed Rule for 32 GB DIMM

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

호환 플랫폼

DDR5-4800 ECC RDIMM. Dell PowerEdge R660과 호환 가능, R760, R770, R860, R960 (42세대 제온). 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.