Hynix
A high-performance enterprise DDR5 RDIMM solution built for AI, big data, and next-generation data centers. Increases effective bandwidth by 70% over DDR4 with data rates starting from 5,600 Mbps and reaching beyond 6,400 Mbps. Features dual sub-channel architecture with two independent 40-bit channels delivering 2x bandwidth. Supports densities from 16Gb to 32Gb and module capacities up to 256GB. Operates at 1.1V with on-DIMM PMIC for stable power management. Ideal for high-throughput servers, virtualization, and memory-intensive enterprise applications.
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Key Features
Advanced Module
Having launched the world’s first DDR5 DRAM, SK hynix presents RDIMMs in 16-256GB capacities based on 16Gb or 24Gb DDR5, with substantial performance improvements over DDR4 RDIMMs that lead the next generation of memory module solutions.
Higher Bandwidth, Faster Speeds
Our 16Gb or 24Gb DDR5 RDIMM increases effective bandwidth by 70% over DDR4, while capable of data rates starting from 5,600Mbps and reaching beyond 6,400Mbps, ultimately targeting more than 2x speed improvement. Such gains reduce the number of servers needed for the same level of system performance and allow greener operation of datacenters, as intended by SK hynix’s Memory ForEST* vision.
Double Sub-channel DRAM Architecture
With a dual sub-channel structure, DDR5 RDIMM increases the number of CA (Command-Address) pins to seven double-data-rate CA buses each from host to RCD and 14 single-data-rate buses each on RCD to DRAM. Having two independent 40-bit channels thus enables 2x bandwidth and higher bus (signal) efficiency compared to a single-channel DDR4 DIMM.
Diverse range of configurable capacities
With DDR5 mono-die density that not only starts from 16Gb but also supports 24Gb, RDIMM modules of various capacities can be configured for each use case and needs, enabling low-power, high-capacity modules for cost savings.
Hynix product details
Official product imagery — specifications, design and interfaces at a glance.
Product Information
A high-performance enterprise DDR5 RDIMM solution built for AI, big data, and next-generation data centers. Increases effective bandwidth by 70% over DDR4 with data rates starting from 5,600 Mbps and reaching beyond 6,400 Mbps. Features dual sub-channel architecture with two independent 40-bit channels delivering 2x bandwidth. Supports densities from 16Gb to 32Gb and module capacities up to 256GB. Operates at 1.1V with on-DIMM PMIC for stable power management. Ideal for high-throughput servers, virtualization, and memory-intensive enterprise applications.
Use the media gallery, selected capacity and specification matrix to confirm fit before sending a quote or sample request.
Technical Specifications
| Memory Technology | DDR5 SDRAM |
|---|---|
| DIMM Type | RDIMM |
| Speed (Data Rate) | DDR5-6400 |
| Voltage | 1.1 V |
| Error Correction | ECC |
| Pin Count / Form Factor | 288-pin |
| Operating Temperature | 0 °C to 85 °C |
| Compliance | JEDEC, RoHS |
User Guide / Documents
Manufacturer datasheets, manuals and compliance files are shared only when the approved file is available for the confirmed RFQ.
Warranty & Support
Warranty, firmware, batch documentation and RMA terms are confirmed in the written quotation or sales contract. ByteExo coordinates after-sales support through the listed manufacturer channel and the customer's confirmed order record.
Procurement FAQ
What DDR5 modules do you offer?
We offer DDR5 RDIMM modules from Samsung, SK Hynix, and Micron in 32GB, 64GB, 96GB, and 128GB capacities, at DDR5-5600 and DDR5-6400 speeds, with 288-pin form factor, ECC, and 1.1V operating voltage.
What are the key advantages of DDR5 over DDR4?
DDR5 offers approximately 1.5–2× the memory bandwidth of DDR4, lower voltage (1.1V vs 1.2V), higher per-DIMM capacity (up to 128GB vs 64GB), and on-module ECC plus system-level ECC for improved reliability. For AI, HPC, and next-generation database workloads, DDR5 delivers substantially higher memory throughput.
Is DDR5 backward-compatible with DDR4 slots?
No. DDR5 uses a different physical connector and is not backward-compatible with DDR4 slots. DDR5 requires a server platform with DDR5 support, such as Intel Xeon Scalable 4th Gen (Sapphire Rapids) or AMD EPYC 4th Gen (Genoa). Please confirm your platform before ordering.
What is the difference between DDR5-5600 and DDR5-6400?
DDR5-6400 provides approximately 14% higher peak bandwidth than DDR5-5600. As with DDR4, your processor's memory controller determines the maximum supported speed. Sapphire Rapids natively supports DDR5-4800; running DDR5-5600 or DDR5-6400 requires XMP/EXPO profiles or platform certification.
What capacities are available and how much total memory can I install?
Per-DIMM capacities: 32GB, 64GB, 96GB, 128GB. A 2-socket server with 24 DIMM slots populated with 128GB modules supports up to 3TB of RAM — essential for memory-intensive AI training, large in-memory databases, and high-concurrency virtualisation.
Do these modules support on-DIMM ECC?
Yes. DDR5 architecture includes on-DIMM ECC as a standard feature in addition to system-level ECC provided by the server platform. This dual-layer error correction significantly improves reliability compared to DDR4.
Are these modules compatible with Intel Sapphire Rapids and AMD Genoa?
Yes. All modules comply with JEDEC DDR5 standards and are compatible with Intel Xeon Scalable 4th Gen (Sapphire Rapids) and AMD EPYC 4th Gen (Genoa). Please verify your server's QVL for specific speed grade certification.
What compliance standards do these modules meet?
All DDR5 modules are JEDEC-compliant and RoHS-certified.
What is the operating temperature range?
0°C to 85°C, suitable for standard air-cooled and liquid-assisted data center cooling environments.
What is the typical use case for DDR5 RDIMMs?
AI training servers, large-scale virtualisation hosts, in-memory databases (SAP HANA, Redis), high-frequency trading platforms, and any workload where memory bandwidth and capacity are bottlenecks. DDR5 is the native and recommended memory standard for Sapphire Rapids and Genoa-based servers.
Compare Models in This Series
3 models — comparing key specifications to help with model selection.
| Model | Interface | Form Factor | Seq Read | Seq Write | Capacities | DWPD | MTBF |
|---|---|---|---|---|---|---|---|
| Samsung | — | — | — | — | 32GB (5600)–128GB (6400) | — | — |
| Hynix | — | — | — | — | 32GB (5600)–128GB (6400) | — | — |
| Micron | — | — | — | — | 32GB (5600)–128GB (6400) | — | — |
Brand-original, incoming-inspected
Every unit is brand-original from the listed manufacturer and incoming-inspected before dispatch. RFQ documentation can include manufacturer datasheets and compliance files when available.
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