# Samsung M321RAJA0MB0-CWM Compatible Replacement — HGCHIPS 128GB DDR5-5600 ECC RDIMM, In Stock

> HGCHIPS 128GB DDR5-5600 ECC RDIMM (HGD5R series) is the pin-to-pin compatible replacement for Samsung M321RAJA0MB0-CWM — the 2Rx4, CL46, PC5-44800R server module that current Intel Xeon and AMD EPYC platforms identify directly, with no board change and no firmware change. The 128GB tier sits one notch above the 96GB sweet spot and carries the same allocation-market profile: broker lots cluster around US$4,400–4,700 per module with 3–5 day lead times, against contract references well below that as Q4 DRAM pricing adds another 10–15%. The HGCHIPS replacement ships from Shenzhen stock at ¥29,500/pc tax included (≈ US$4,150) — about 10% below the spot mid — within 48 hours, every lot functionally tested on a DDR5 platform with traceable records. Small-batch board validation before full import is recommended; samples ship immediately.

## Specifications

| Parameter | Value |
| --- | --- |
| Reference part number | Samsung M321RAJA0MB0-CWM (128GB 2Rx4 DDR5-5600, CL46) |
| HGCHIPS series | HGD5R — DDR5 RDIMM replacement series (full P/N via FAE) |
| Memory technology | DDR5 SDRAM |
| Capacity | 128GB |
| Data rate | 5600 MT/s (PC5-44800R) |
| CAS latency | CL46 |
| Module type | RDIMM (Registered ECC) |
| Rank / organization | 2Rx4 (dual-rank x4) |
| Component composition | (8G x4) x40 |
| Voltage | 1.1V |
| Form factor | 288-pin RDIMM |
| Error correction | On-die ECC + module ECC |
| OEM cross-reference | Supermicro MEM-DR512L-SL01-ER56 (same Samsung module, Supermicro certified) |
| Operating temperature | 0°C to +95°C (per distributor spec sheets) |

Electrical parameters referenced from the Samsung official module page (semiconductor.samsung.com/dram/module/rdimm/m321raja0mb0-cwm/) and distributor spec sheets (corewavelabs / verilicense / tekhland, checked 2026-11-13); HGCHIPS replacement parameters verified to match the reference profile. Market signals retrieved 2026-11-13; dates shown per row.

## Why HGCHIPS

- Top-tier engineering — design team from China's leading chip design companies and research institutes
- First-tier supply chain — domestic first-rank wafer fab, world top-3 substrate supplier, top-3 domestic packaging & test
- Pin-to-pin, platform-native — no board change, no firmware change; Xeon / EPYC identify the module directly
- Tested before shipment — SPD conformance read-back plus functional burn-in on a DDR5 platform, traceable per lot
- HGD5R naming — follows the HGCHIPS HGD rule (generation 5 + density + width + package + speed bin); full P/N via FAE
- 24-hour quotes — BOM line in, firm price and lead time back the same business day

## Market signals

| Signal | Detail | Source |
| --- | --- | --- |
| Broker spot lots | CoreWave lists M321RAJA0MB0-CWM at US$4,683/pc with 47 pcs available, 3–4 day lead (updated 5 Oct 2026); sister code M321RAJA0MB2-CWM at US$4,565/pc with 1,000 pcs, 4–5 day lead (updated 15 Oct 2026) — deep but expensive spot stock. | corewavelabs.com listings, Oct 2026 (retrieved 2026-11-13) |
| Multi-broker confirmation | memory.net shows 256 pcs at US$4,408; ServerSupply prices the 4800-grade sibling M321RAGA0B20-CWK at US$6,450 new — the 128GB tier trades at a wide, elevated spread typical of an allocation market. | memory.net / serversupply.com listings, checked 2026-11-13 |
| Contract market tightening | TrendForce-tracked Q4 DRAM contract prices are rising another 10–15% on server DDR5/RDIMM demand as AI memory upsizing continues; retail tracker Tom's Hardware notes 128GB-class modules at record levels into Nov 2026. | trendforce.com press coverage, Nov 2026; tomshardware.com RAM index 2026-11-11 |
| HGCHIPS price position|¥29,500/pc tax incl. (≈ US$4,150) vs. spot-market reference ≈ US$4,565 (broker mid) — about 10% below; 48h Shenzhen shipment; lot test records provided.|HGCHIPS price list, Nov 2026 |

## FAQ

**Q: Is the HGCHIPS module a drop-in replacement for M321RAJA0MB0-CWM?**

Yes — same 288-pin RDIMM form factor, 2Rx4 organization and CL46 speed profile; current Intel Xeon and AMD EPYC platforms identify it without board or firmware changes. We recommend a small-batch board validation (samples available) before full production import.

**Q: What about the CWM vs CWMHY suffix and the MB0/MB2 difference?**

Trailing fields are packing/revision identifiers (CWM = standard bulk; CWMHY adds packing/hygrometry handling). MB0 and MB2 are die-revision variants of the same module with identical electrical specification. Send your exact BOM line and we confirm suffix equivalence in writing.

**Q: What does it cost and how fast can you ship?**

¥29,500 per module tax included (≈ US$4,150) — about 10% below the current broker mid of ≈ US$4,565. Shenzhen stock ships within 48 hours; every lot carries a traceable functional test record.

## Contact

Quote: info@hgtech.cc (subject: M321RAJA0MB0-CWM replacement) · +86 760 8992 4799 · WhatsApp +852 9298 5589
Room 301-319, 3/F, Longde Building, Wuguishan Street, Zhongshan 528400, Guangdong, China
Page: https://hgchips.net/parts/samsung-m321raja0mb0-cwm.html · Last updated: 2026-11-13