Astera Labs

Leo CXL Memory Connectivity Platform

E-Series, P-Series, A-Series
Astera Labs delivers Leo CXL™ Memory Connectivity Platform to eliminate memory bandwidth bottlenecks and capacity constraints for compute-intensive workloads such as AI and ML.
Leo CXL Memory Connectivity Platform


Astera Labs’ Leo Memory Connectivity Platform for CXL 1.1 and 2.0 is the industry’s leading purpose-built SoC and hardware solution to eliminate memory bandwidth and capacity bottlenecks and reduce stranded memory in cloud servers.

Leo CXL Smart Memory Controllers enable robust memory expansion and disaggregated memory pooling and sharing for processors, workload accelerators, and smart I/O devices. Leo eliminates the need to overprovision memory thereby reducing overall TCO and optimizing CPU efficiency and application performance for computational workloads.

Aurora A-Series CXL Smart Memory Hardware Solutions offer all the benefits of Leo Controllers and enable quick plug-and-play CXL deployment with faster time-tomarket for system OEMs and data centers.


  • Cloud servers with compute-intensive workloads such as Artificial Intelligence (AI) and Machine Learning (ML)
  • Heterogeneous CPU, GPU, and accelerator servers
  • General-purpose compute servers 

Benefits and Features

astera-chip-leo-e-series-564x564        astera-chip-leo-p-series-564x564
Leo CXL Smart Memory Controllers
  • Purpose-built for cloud-scale deployment targeting workloads such as AI and Machine Learning
  • Memory expansion, pooling and sharing for heterogeneous CPU/GPU topologies
  • CXL Type-3 device supporting CXL 1.1 and 2.0 memory expansion
  • CXL interface up to 32 GT/s per lane, up to 16 lanes
  • Multiple DDRx channels to increase memory capacity up to 2TB
  • Up to 5600 MT/s per memory channel to fully utilize available bandwidth of the CXL 1.1 and 2.0 interface
  • Server-grade customizable RAS and software APIs to integrate with fleet management services
  • Seamless interoperation with all major CPU, GPU, and memory vendors
  • Flexible and scalable memory interface with a low latency data path
  • Best-in-class security features to ensure end-to-end data integrity and protection

Aurora A-Series CXL Smart Memory Hardware Solutions
  • All the benefits and features of Leo CXL Smart Memory Controllers
  • PCIe x16 CEM add-in card form factor
  • Lower TCO via more granular serviceability—can replace a single failing DIMM
  • Configurable memory capacity with plug-and-play DIMM slots
  • Up to 4x DDR5 RDIMMs supporting up to 2TB
  • On-board debug connectors for fleet management on Cloud Servers
  • Temperature and health monitoring of Leo Memory Controllers and memory
  • RDIMM fault isolation and error correction
  • High-volume, production-qualified solutions with robust supply chain

*Astera Labs Authorized Distributor




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