Renesas Electronics has announced sampling of its sixth-generation Registered Clock Driver (RCD) for DDR5 Registered Dual In-line Memory Modules (RDIMMs), targeted at data center server platforms. The new RRG5006x Gen6 RCD is the first in the industry to achieve a data rate of 9600 Mega Transfers Per Second (MT/s), exceeding the previous generation’s 8800 MT/s and setting a new performance benchmark for memory interfaces, according to Renesas.

The Gen6 RCD delivers a 10 percent bandwidth increase over Renesas’ Gen5 RCD while maintaining backward compatibility with Gen5 platforms to ease upgrade paths. Technical enhancements include improved signal integrity, power efficiency, and an expanded Decision Feedback Equalization architecture featuring eight taps and 1.5 mV granularity for finer margin tuning. The RCD also introduces Decision Engine Signal Telemetry and Margining, which supports real-time signal quality indication, margin visibility, and diagnostic feedback at higher memory speeds.

Renesas notes that this product is aimed at supporting the increasing memory bandwidth requirements of artificial intelligence (AI), high-performance computing (HPC), large language models, and other data center applications. The Gen6 RCD is designed to deliver the reliability and scalability demanded by next-generation server platforms.

Regarding technical advantages, Sameer Kuppahalli, Vice President of Memory Interface Division at Renesas, said, “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.”

Indong Kim, Vice President of DRAM Product Planning at Samsung Electronics, added, “Samsung has collaborated with Renesas across multiple generations of memory interface components, including the successful qualification of Gen5 DDR5 RCD and PMIC5030,” “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.”

Sampling of the RRG5006x RCD is underway to select customers, including all major DRAM suppliers. Production availability is expected in the first half of 2027. Renesas will showcase its memory interface solutions at the SC25 conference in St. Louis from November 16 to 21, 2025.

Source: Renesas Electronics