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DDR5 Registering Clock Driver, SPD Hub and Temperature Sensor Chips
| Description | Part Number | Product Brief | Applications | Status |
|---|---|---|---|---|
| 6400 MT/s Registering Clock Driver | RCD3-G1A |  | Server RDIMM, NVDIMM | Sampling |
| 5600 MT/s Registering Clock Driver | RCD2-G1B | | Server RDIMM, NVDIMM | In Production |
| 4800 MT/s Registering Clock Driver | RCD1-G1EX | | Server RDIMM, NVDIMM | In Production |
| SPD Hub with Internal Temperature Sensor | SPD5118-G1B | | Server RDIMM, NVDIMM PC UDIMM, SODIMM | In Production |
| Temperature Sensor | TS5110-G1B | | Server RDIMM, NVDIMM | In Production |
Rambus DDR5 DIMM Chipset Performance
The Rambus DDR5 Memory Interface Chipset enables increased memory capacity, while maintaining peak performance on dual inline memory modules (DIMMs). These gains are essential to handle the most data-intensive workloads.
DDR5 Registering Clock Drivers (RCD), Serial Presence Detect Hubs (SPD Hub) and Temperature Sensors (TS) are targeted for use in server DDR5 Registered DIMMs (RDIMMs), and Non-volatile memory DIMMs (NVDIMMs) to deliver exceptional bandwidth, performance and capacity. The SPD Hub also enables DDR5 Unbuffered DIMMs (UDIMMs) and Small-Outline DIMMs (SODIMMs) for PC clients.
Watch a video demo of our DDR5 Server DIMM buffer chipset
The RCD is the key control plane chip which distributes Command/Address signals and clock to the DRAM devices on the RDIMM.
The SPD Hub enables communication via the I3C bus of important data for system configuration and thermal management. It has an integrated temperature sensor.
Two TS per DIMM offer precision thermal sensing and, in combination with the SPD Hub, provide three points of thermal telemetry for the memory module.
DDR5 UDIMM block diagram showing SPD Hub
Scaling DDR5 DIMMs
DDR5 DIMMs increase memory bandwidth and capacity over DDR4 DIMMs with new innovations and a new module architecture. While DDR4 DIMMs top out at 3200 MT/s, the first DDR5 DIMMs launched at 4800 MT/s, a 50% increase in memory bandwidth.
Given the voracious demands for greater memory bandwidth to support advanced workloads including HPC and AI/ML, DDR5 will continue to scale. Rambus is constantly advancing the performance of its DDR5 solutions to meet growing market needs. Rambus delivered the industry’s first 5600 MT/s RCD and continues to push performance levels further with the announcement of a 6400 MT/s DDR5 RCD.
Data Center Evolution: DDR5 DIMMs Advance Server Performance
Driven by a confluence of megatrends, global data traffic is increasing at an exponential rate. For example, 5G networks are enabling billions of AI-powered IoT devices untethered from wired networks. Nowhere is the impact of all this growth being felt more intensely than in data centers. Indeed, hyperscale data centers have become the critical hubs of the global data network. DDR5 DRAM will enable the next generation of server systems providing the massive computing power of hyperscale and enterprise data centers. Learn about the benefits of DDR5 memory and the design considerations for implementing DDR5 DIMMs.
