Memory Interface Chips
DDR5 DIMM Chipset
The Rambus DDR5 DIMM memory interface chipset is tailored for the high-capacity, high-speed performance requirements of the latest generation DDR5 memory systems. Our chips enable server and client computing systems to handle the most demanding workloads and applications.
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RCDHow the DDR5 DIMM Chipset Works
Our DIMM Chipset enables increased memory capacity, while maintaining peak performance on a dual inline memory module (DIMM). These gains are essential to handle the most grueling data-intensive applications.
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), Load Reduced DIMMs (LRDIMMs), 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 DIMM.
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.
| Part Number | Description | Applications |
|---|---|---|
| RCD1-G1EX | Registering Clock Driver | Server RDIMM, LRDIMM, NVDIMM |
| SPD5118-G1B | SPD Hub with Internal Temperature Sensor | Server RDIMM, LRDIMM, NVDIMM PC UDIMM, SODIMM |
| TS5110-G1B | Temperature Sensor | Server RDIMM, LRDIMM, NVDIMM |
Scaling DDR5
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 operate 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 already working on the next wave of DDR5 solutions with the announcement of the industry’s first 5600 MT/s RCD. You can check out all the features and benefits of DDR5 server DIMMs here.
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.
Solution Offerings
- Designed for frequency data rate scalability starting at 4800 MT/s
- Advanced in-system debug capability
- Wide temperature operating range
- High-performance servers and workstations
- High-capacity storage systems
- Network devices
- PC desktops and laptops (SPD Hub)
More capacity and more bandwidth: DDR5 memory enables next-generation data centers
Hear Shane Rau, Research Vice President at IDC discuss the market and technology trends surrounding the DDR5 transition, including workloads, hardware needs, market perspectives and industry timing. Joining him, John Eble, Vice President of Product Marketing at Rambus will examine the changes from DDR4 to DDR5 that are enabling more memory capacity and bandwidth critical to scaling future data centers.
