Micron MTC40F2046S1RC48 is the 512GB DDR5-4800 ECC RDIMM built with Micron's die-stacked (TSV) DRAM — the family Micron demonstrated at 9,200 MT/s on September 15–16, 2026, delivering 12TB per 24 DIMM slots at only 16.0W per module. This is the highest-capacity server RDIMM line shipping ahead of volume TSV production in H2 2027, and demand from AI server builders is far ahead of supply. HGCHIPS sources this family through channel stock with full traceability: send your BOM line and we confirm exact suffix availability, test records and lead time within 24 hours.
| Manufacturer | Micron |
|---|---|
| Part number family | MTC40F2046S1RC48 (512GB DDR5-4800 class; related MTC40F2046 speed variants 4800/5600/6400) |
| Memory technology | DDR5 SDRAM, die-stacked (TSV) |
| Capacity | 512GB |
| Data rate | 4800 MT/s production class (family demonstrated at 9,200 MT/s, Sep 2026) |
| CAS latency | CL40 family (CL40/46/52 across speed grades) |
| Module type | RDIMM (Registered ECC) |
| Form factor | 288-pin RDIMM |
| Voltage | 1.1V |
| Power (demo module) | 16.0W vs 44.2W for two 256GB modules — 64% energy saving per 512GB |
| Bandwidth (demo) | 9,200 MT/s → 12TB per 24 DIMM slots (vs 6TB today) |
| Availability | Channel stock on request; volume TSV production H2 2027 |
| Error correction | On-die ECC + module ECC |
Electrical parameters from Micron MTC40F2046 family datasheet (Mouser) and Sep 2026 launch coverage. Market signals retrieved 2026-11-11; dates shown per row.
| Signal | Detail | Source & date |
|---|---|---|
| Technology demonstration | Micron demonstrated the 512GB TSV-based RDIMM at 9,200 MT/s at a Sept 15–16, 2026 launch event, reporting AMD and Intel validation under way and volume production in H2 2027. | Tom's Hardware / Blocks & Files / heise online coverage, Sep 2026 |
| AI-server demand pull | Trade press frames 512GB RDIMMs as the memory ceiling-raiser for AI servers and 2-socket Xeon/EPYC builds through 2027 — the exact segment HGCHIPS supplies. | Omnixon / Blocks & Files / Tom's Hardware, Sep–Oct 2026 |
| Family availability | MTC40F2046 family datasheets and listings circulate through Mouser and channel distributors — the 512GB production class is orderable today, speed-bin suffixes confirmed at quotation. | Mouser MTC40F2046WS1RC datasheet; omnixon.com listing, retrieved 2026-11-11 |
No — 9,200 MT/s was the September 2026 demonstration speed. Production 512GB modules ship in the 4800–6400 MT/s speed classes today; volume TSV production is slated for H2 2027. We quote the currently orderable suffix and note the roadmap in the offer.
Through-silicon-via stacking puts multiple DRAM dies in one package, so a 512GB module uses far fewer packages, runs at 16W instead of ~44W per 512GB, and frees DIMM slots — 12TB in 24 slots instead of 6TB. That is why AI server builders are pre-booking this family.
Send the complete part number including the suffix (e.g. ...RC48B##). We match the suffix, provide photos of the actual modules and date codes, and attach the functional test record before you commit.
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