Renesas Electronics announces that it has delivered the industry’s first sixth-generation Registered Clock Driver (RCD) for DDR5 registered dual in-line memory modules (RDIMMs). The new RCD is the first to achieve a data rate of 9,600 megatransfers per second (MT/s), surpassing the industry standard. This marks a significant leap from the 8800MT/s performance of Renesas’ Gen5 RCD, setting a new standard for memory interface performance in data centre servers.
Key features of Renesas’ Gen6 DDR5 RCD
- 10% bandwidth increase over Renesas’ Gen5 RCD (9600MT/s versus 8800MT/s)
- Backward compatibility with Gen5 Platforms: provides seamless upgrade path
- Enhanced signal integrity and power efficiency: enables AI, HPC, and LLM workloads
- Expanded decision feedback equalisation architecture: offers eight taps and 1.5mV granularity for superior margin tuning
- Decision engine signal telemetry and margining (DESTM): improved system-level diagnostics provides real-time signal quality indication, margin visibility, and diagnostic feedback for higher speeds
The new DDR5 RDIMMs are needed to keep pace with the ever-increasing memory bandwidth demands of artificial intelligence (AI), high-performance compute (HPC) and other data centre applications. Renesas has been instrumental in the design, development, and deployment of the new RDIMMs, collaborating with industry leaders including CPU and memory providers, along with end customers. Renesas is the leader in DDR5 RCDs, building on its legacy of signal integrity and power optimisation expertise.
“Explosive growth of generative AI is fuelling higher SoC core count. This is driving unprecedented demand for memory bandwidth and capacity as a critical enabler of data centre 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
Renesas is now sampling the new RRG5006x RCD to select customers, including all major DRAM suppliers. Production availability is expected in the first half of 2027.
Renesas at SC25
Renesas will showcase its memory interface solutions at the SC25 conference in St. Louis from 16-21st November 2025 at booth #4101.
