Rambus Intros Industry’s Fastest HBM4E Memory Controller: 60% Faster Vs HBM4 at 4.1 TB/s Per IC

Mar 4, 2026 at 05:00pm EST
A close-up image of Rambus semiconductor chips labeled 'Rambus HBM4E'.

Rambus has announced the development of its fastest HBM controller yet, based on the HBM4E standard, offering up to 16 Gbps transfer speeds per pin.

Ready For Next-Gen AI Data Center Superchips, Rambus Intros HBM4E Memory Controller

As expected, Rambus has developed the world's fastest HBM4E memory controller, offering a 60% boost over its HBM4 controller with up to 16 Gbps pin speeds (vs 10 Gbps on HBM4) and up to 4.1 TB/s of total bandwidth per module (vs 2.56 GB/s on HBM4). The HBM4E standard will be utilized by NVIDIA's Rubin Ultra GPUs and AMD's MI500 series accelerators.

Related Story SK Hynix Previews HBM4E Memory at Computex, Cramming 48GB Into a 12-Hi Stack and Pushing Bandwidth to a Record 4 TB/s

Press Release: Rambus, a premier chip and silicon IP provider making data faster and safer, today announced the industry’s leading HBM4E Memory Controller IP, extending its market leadership in HBM IP. This new solution delivers breakthrough performance with advanced reliability features enabling designers to address the demanding memory bandwidth requirements of next- generation AI accelerators and graphics processing units (GPUs).

Rambus HBM4E Controller IP Features:

The Rambus HBM4E Controller enables a new generation of HBM memory deployments for cutting-edge AI accelerators, graphics, and HPC applications. The HBM4E Controller is capable of supporting operation up to 16 Gigabits per second (Gbps) per pin, providing an unprecedented throughput of 4.1 Terabytes per second (TB/s) to each memory device.

For an AI accelerator with eight attached HBM4E devices, this translates to over 32 TB/s of memory bandwidth for next-generation AI workloads. The Rambus HBM4E Controller IP can be paired with third-party standard or TSV PHY solutions to instantiate a complete HBM4E memory subsystem in a 2.5D or 3D package as part of an AI SoC or custom base die solution.

Availability and More Information:

The Rambus HBM4E Controller IP is the latest addition to the Rambus leading-edge portfolio of digital controller solutions. The HBM4E Controller is available for licensing, and early access design customers can engage today.

About the author: A Software Engineer by training and a PC enthusiast by passion, Hassan Mujtaba serves as Wccftech's Senior Editor for hardware section. With years of experience in the industry, he specializes in deep-dive technical analysis of next-generation CPU and GPU architectures, motherboards, and cooling solutions. His work involves not only breaking news on upcoming technologies but also extensive hands-on reviews and benchmarking.

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