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.
المواصفات الفنية
| معامل | تخصيص |
|---|---|
| سعة | 32 GB per DIMM |
| يكتب | DDR5 SDRAM, Registered (RDIMM), ECC |
| سرعة | 4800 جبل/ق (PC5-38400) |
| CAS Latency | CL40 (CL40-39-39 at 4800 جبل/ق) |
| Organization | 1Rx8 (single-rank, x8 DRAM devices) or 2Rx8 (dual-rank, depending on SKU) |
| Voltage | 1.1V VDD, 1.8V VPP |
| DRAM Process | SK hynix 1a-class (14نانومتر) DDR5 DRAM |
| On-Die ECC | Yes (DDR5 standard — per-subchannel error correction) |
| Sideband ECC | Yes (standard ECC across data bus) |
| Temperature Sensor | Integrated SPD thermal sensor (I2C, read by iDRAC/iBMC) |
| PMIC | On-DIMM Power Management IC (DDR5 standard) |
| عامل الشكل | 288-pin DDR5 RDIMM, standard height (31.25 مم) |
| Physical | 133.35 x 31.25 مم, ~16g |
| Temperature | 0C to 85C |
| Qualified Platforms (ديل) | PowerEdge R660, R760, R770, R860, R960 (4th Gen Xeon platform) |
| Qualified Platforms (xFusion) | FusionServer 2288H V7, 2488ح V7, 5288 V7, 5885ح V7 |
| ضمان | 3-year (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 غيغابايت | 16x (1DPC, all channels) | 512 غيغابايت | ~$4,000 |
| Database server, 1 TB working set | 64 غيغابايت | 16x (1DPC, all channels) | 1 تيرابايت | ~$8,000 |
| VMware host, 100+ VMs, 2 TB needed | 128 غيغابايت | 16x (1DPC) or 32x 64 غيغابايت (2DPC, speed penalty) | 2 تيرابايت | ~$16,000 |
| In-memory database, 4 TB needed | 256 غيغابايت (3DS RDIMM) | 16x (1DPC, 16 channels) | 4 تيرابايت | ~$40,000 |
The 1DPC Speed Rule for 32 GB DIMMs
One DIMM per channel at 4800 MT/s delivers full rated speed. Two DIMMs per channel drop to 4400 جبل/ق (3DS RDIMM) أو 4800 جبل/ق (standard RDIMM, platform-dependent). For a dual-socket server with 16 memory channels, ordering 16x 32 GB at 1DPC gives you full bandwidth on all 16 channels. 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 غيغابايت; populate all 32 slots only if you need 1 تيرابايت.
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.
Source Through Xincuan
We supply SK hynix DDR5 RDIMMs pre-installed in Dell and xFusion servers. Factory-direct pricing, 3-year warranty, and global shipping.
