TOKYO, Japan, Nov 13, 2025 – Renesas Electronics has delivered Registered Clock Driver (RCD) for DDR5 Registered Dual In-line Memory Modules (RDIMMs) that supports data rates up to 9,600 mega-transfers per second (MT/s).
Key Features of Renesas’ Gen6 DDR5 RCD:
- 10% bandwidth increase over Renesas’ Gen5 RCD (9600 MT/s versus 8800 MT/s)
- Backward compatibility with Gen5 platforms: Provides upgrade path
- Enhanced signal integrity and power efficiency: Enables AI, HPC, and LLM workloads
- Expanded decision feedback equalization architecture: Offers eight taps and 1.5mV granularity for superior margin tuning
- Decision engine signal telemetry and margining (DESTM): Enhanced system-level diagnostics provides signal quality indication, margin visibility, and diagnostic feedback for higher speeds
The new DDR5 RDIMMs deliver the bandwidth needed for AI, high-performance computing and other data center workloads. Renesas supported the design, development and deployment of the new RDIMMs by working with CPU vendors, memory suppliers and customers.
“Explosive growth of generative AI is fueling higher SoC core count. This is driving unprecedented demand for memory bandwidth and capacity as a critical enabler of data center performance,” said Sameer Kuppahalli, vice president of memory interface division at Renesas. “Our sixth generation DDR5 Registered Clock Driver demonstrates Renesas’ continued commitment to memory interface innovation, path-finding and delivering solutions to stay ahead of market demand.”
“Samsung has collaborated with Renesas across multiple generations of memory interface components, including the successful qualification of Gen5 DDR5 RCD and PMIC5030,” said Indong Kim, VP of DRAM product planning, Samsung Electronics. “We are now excited to integrate Gen6 RCD into our DDR5 DIMMs, across multiple SoC platforms to support the growing demands of AI, HPC, and other memory-intensive workloads.”
Availability
The RRG5006x Gen6 RCD is designed for server platforms and supports performance, reliability and scalability requirements. Renesas is sampling the device to select customers, including DRAM suppliers. Production is planned for the first half of 2027.
Renesas at SC25
Renesas will show its memory interface solutions at the SC25 conference in St. Louis from Nov. 16 to Nov. 21 (#booth 4101).
Source: Renesas Electronics
About Renesas Electronics
Renesas Electronics, based in Tokyo, supplies power management integrated circuits (PMICs) and ships more than 1.5 billion power devices annually for computing, industrial, IoT, data center, and communications markets. Its portfolio includes PMICs, discrete devices, GaN power products, and design tools such as PowerCompass and PowerNavigator. These work with microcontrollers, SoCs, and connectivity solutions to support system design. The company was formed in 2010 through the merger of Renesas Technology and NEC Electronics, with origins in semiconductor units of Hitachi, Mitsubishi, and NEC.
About SC25
SC25 will take place Nov. 16–21, 2025, in St. Louis, MO. The event brings together professionals in high-performance computing, networking, storage and data analysis from universities, companies and government organizations. Attendees include researchers, engineers, developers and system administrators who work with data-center infrastructure, scientific computing and enterprise applications. The program includes tutorials, workshops, panels, technical papers, exhibits and a student cluster competition.