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The 128GB DIMM That Takes a 2-Socket Server From 4 TB to 8 TB Without Changing Anything Else
A dual-socket Dell R760 has 32 فتحات DIMM. Populate all 32 with 64GB DIMMs and you get 2 تيرابايت. Populate them with 128GB 3DS RDIMMs and you get 4 تيرابايت. With 256GB 3DS DIMMs, 8 تيرابايت. The Samsung 128GB DDR5-5600 3DS RDIMM is the middle step — the density that turns a memory-hungry virtualization host or an in-memory database server from “can’t fit the workload” ل “has headroom for growth.” It is a 3D-stacked (TSV, through-silicon via) registered DIMM with 4 ranks, ECC, and on-die thermal sensors — the densest standard form factor before stepping up to the 256GB tier.
المواصفات الفنية
| معامل | تخصيص |
|---|---|
| سعة | 128 GB per DIMM |
| يكتب | DDR5 SDRAM, Registered (RDIMM), 3س (3D Stacked, TSV), ECC |
| سرعة | 5600 جبل/ق (PC5-44800) |
| CAS Latency | CL46 (CL46-46-46 at 5600 جبل/ق) |
| Organization | 4Rx4 (quad-rank, x4 DRAM devices, 3D-stacked via TSV) |
| Voltage | 1.1V VDD, 1.8V VPP |
| DRAM Process | Samsung 1a-class (14نانومتر) DDR5 DRAM |
| Stacking | TSV (Through-Silicon Via) 3D stacking — 8 DRAM dies stacked per module |
| On-Die ECC | Yes (DDR5 standard) |
| 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 |
| عامل الشكل | 288-pin DDR5 RDIMM, standard height (31.25 مم) |
| Physical | 133.35 x 31.25 مم, ~21g |
| درجة حرارة | 0C to 85C |
| Qualified Platforms (ديل) | PowerEdge R660, R760, R770, R860, R960 (4th/5th Gen Xeon) |
| Qualified Platforms (xFusion) | FusionServer 2288H V7, 2488ح V7, 5288 V7, 5885ح V7 |
| ضمان | 3-year (with server) |
Memory Density Configuration Guide
| الخادم | DIMM Slots | 64GB RDIMM (1DPC) | 128GB 3DS RDIMM (1DPC) | 256GB 3DS RDIMM (1DPC) | Max with 2DPC |
|---|---|---|---|---|---|
| Dell R470 (1-socket) | 16 | 512 غيغابايت | 1 تيرابايت | 2 تيرابايت | 4 تيرابايت |
| Dell R660/R760/R770 (2-socket) | 32 | 1 تيرابايت | 2 تيرابايت | 4 تيرابايت | 8 تيرابايت |
| Dell R860 / xFusion 2488H V7 (4-socket) | 64 | 2 تيرابايت | 4 تيرابايت | 8 تيرابايت | 16 تيرابايت |
| Dell R7715 (1-socket EPYC) | 24 | 768 غيغابايت | 1.5 تيرابايت | 3 تيرابايت | 6 تيرابايت |
3DS Stacking Explained — Why 128GB Costs More Than Two 64GB DIMMs But Is Worth It
A standard 64GB RDIMM has DRAM chips on two sides of the module (dual-rank). A 128GB 3DS RDIMM stacks DRAM dies vertically using through-silicon vias — 8 dies stacked per module with vertical interconnects. This achieves higher capacity in the same form factor, but the TSV process is more expensive to manufacture, which is why 128GB 3DS costs more than 2x 64GB RDIMMs. The value proposition: a 2-socket server has a fixed 32 فتحات DIMM. Populating 2x 64GB per slot is impossible — the slot holds one DIMM. 3DS stacking is the only path to 2 TB+ per node on a dual-socket platform.
Compatible Platforms
DDR5-5600 4Rx4 3DS RDIMM. Compatible with Dell PowerEdge 16th Gen (R660, R760, R770, R860, R960) and xFusion FusionServer V7. Verify platform QVL for the specific part number. At 1DPC (1 DIMM per channel), the 128GB 3DS RDIMM runs at DDR5-5600. At 2DPC, speed drops to 4400 جبل/ق (platform-dependent). Do not mix 128GB 3DS RDIMMs with 64GB RDIMMs on the same channel — rank count mismatch forces both to train down.
Source Through Xincuan
We supply Samsung 128GB DDR5-5600 3DS RDIMMs pre-installed in Dell and xFusion servers with factory-direct pricing, 3-year warranty, and global shipping. Our engineers populate DIMMs per the platform optimal population guide.
