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System on Chip design resources
System on Chip design resources
The new registering clock driver raises registered DIMM data rates to 9,600 MT/s for CPU-based servers.
August 6, 2026 -
Memory has been at the center of industry conversation in recent months, and that trend doesn’t seem to be slowing down any time soon. Recently, Rambus announced its DDR5 9600 Server RDIMM chipset, a complete set of interface and power-management ICs for registered dual in-line memory modules (RDIMMs).
AI data centers need more memory at faster speeds to support large-scale inference and agentic workflows. Rambus believes its new products could be a true difference-maker for server architectures.
Rambus built the DDR5 9600 Server RDIMM chipset to give memory module manufacturers greater memory capacity and bandwidth to support growing AI workloads.
At the center of the chipset is a new sixth-generation Registering Clock Driver, the RCD06, which runs at 9,600 MT/s. Because it offers 20% higher frequency than the company's previous driver, the RCD06 should offer meaningful performance improvements for AI’s memory-hungry workloads. For example, one common AI workload, key-value (KV) caching, stores context in DRAM and reads it back constantly to speed up token generation. The faster each memory channel runs, the more traffic it can carry, and the faster it can complete inference.
Rambus’ RCD06 clock driver is only one part of the server memory chipset. The company also includes the PMIC5030 power management IC, which feeds the module high-current power at low voltage, and a Serial Presence Detect (SPD) Hub, which carries a built-in temperature sensor onboard. With a set of dedicated temperature sensor ICs, these components are said to enable module telemetry, configuration, and thermal monitoring.
By putting clocking, control, and power management on one set of qualified parts, Rambus says its memory chipset gives memory manufacturers a cohesive and interoperable path to maintaining signal and power integrity at high data rates. The company also claims that the chipset’s integration spares vendors from sourcing and testing extra components on their own, reducing their need for external components and simplifying RDIMM development.
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