Samsung M321R8GA0BB0-CQK is a 64GB DDR5-4800 ECC Registered DIMM (RDIMM) for Intel Xeon and AMD EPYC server platforms — the exact module buyers are chasing as DDR5 server memory stays on allocation into late 2026. HGCHIPS holds channel stock of this Samsung OEM part number: every tray is visually inspected and functionally tested on a DDR5 platform before shipment, with test records traceable to each lot. Quote within 24 hours; samples available for qualification.
| Manufacturer | Samsung |
|---|---|
| Part number | M321R8GA0BB0-CQK |
| Memory technology | DDR5 SDRAM |
| Capacity | 64GB |
| Data rate | 4800 MT/s (PC5-38400) |
| CAS latency | CL40-39-39 (QK speed bin) |
| Module type | RDIMM (Registered ECC) |
| Rank / organization | 2Rx4 — (4G x4) x40 components |
| Voltage | 1.1V |
| Form factor | 288-pin RDIMM |
| Module height | 31.25mm |
| Error correction | On-die ECC + module ECC, 8-bit parity |
| DRAM components | Samsung 16Gb B-die (K4RAH046VB-BCQK) |
| Operating temperature | 0°C to +85°C (case) |
Electrical parameters from the Samsung DDR5 RDIMM datasheet Rev.1.1 (M321RxGAxBB0 series, 16Gb B-die). Market signals retrieved 2026-11-11; dates shown per row.
| Signal | Detail | Source & date |
|---|---|---|
| Allocation market | DDR5 server RDIMM (48–64GB class) leads October–November 2026 buyer guides on price/lead-time tracking, with distributors quoting multi-week waits on Samsung 64GB modules. | electronics.alibaba.com buyer guides, Nov 2026 (retrieved 2026-11-11) |
| Platform validation | 32 × M321R8GA0BB0-CQK modules (1TB DDR5-6400 population) used as the reference memory in Intel Xeon 6 (Granite Rapids) benchmarking published on GitHub — confirming 2DPC support on current server platforms. | github.com/dotsin/lbm-benchmarking-embeddingsFT, Oct 2026 |
| Price pressure | Retail kit pricing (8 × 64GB) quoted around 990,100 RUB by regional system builders — a strong premium over 2025 contract levels, signalling tight supply of this exact part number. | hyperpc.ru product listing, retrieved 2026-11-11 |
Yes — CQKMG is the trailing packing/revision field Samsung appends for tray packing. The core speed grade (CQK = DDR5-4800, CL40) and module organization are identical; we confirm the full suffix against your BOM before shipping.
Yes. DDR5 RDIMMs are backwards-compatible with lower speeds: the module runs at 4800 MT/s (or the platform-negotiated rate) in DDR5-5600/6400-capable systems, subject to CPU and BIOS population rules. Mixing vendors within one channel is not recommended.
Visual inspection, SPD/EE1004 read-back verification, and functional burn-in on a DDR5 test platform; every shipped lot carries a traceable test record. Photos of the actual tray and date codes are provided with the quote.
Send your BOM line, target quantity and delivery terms — we reply within 24 business hours.
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