Leo CXL Smart Memory Controllers – Astera Labs Product Family Hero BannerLeo CXL Smart Memory Controllers – Astera Labs Product Family Hero Banner

Leo CXL® Smart Memory Controllers

Purpose-built memory expansion, sharing, and pooling for AI and cloud platforms

Download Portfolio Brief
Astera Labs Chip and PCB Board – Leo CXL Smart Memory Controller Hardware

Memory Solutions for the AI Era

  • Accelerates AI and cloud infrastructure with memory expansion, sharing, and pooling for enhanced performance
  • Eliminates bandwidth/capacity bottlenecks, reduces total cost of ownership, and optimizes memory utilization
  • Ensures end-to-end data integrity and protection with best-in-class industry standard security features
  • Delivers server-grade customizable RAS, advanced diagnostics, and fleet management via COSMOS suite

Leo Highlights

Accelerating AI with CXL Memory

Increase Memory
Capacity

Up to 2TB CXL Memory Expansion – Leo Smart Memory Controller Specification Icon

With multiple DDR5 channels,
up to 5600 MT/s

Seamless
Interoperability Across

50 Nanosecond Memory Latency – Leo CXL Smart Memory Controller Performance Icon

Stress tested with all major xPUs and Memory vendors

Enhanced Diagnostics
& Telemetry

Cosmos Platform Logo – Astera Labs Developer Ecosystem for CXL Products

Advanced capabilities through in-band and out-of-band management

Leo Delivers Proven Application Value with CXL

Astera Labs’ Leo CXL Smart Memory Controller is the industry’s first purpose-built solution that supports both memory expansion and memory pooling to solve performance bottlenecks and capacity constraints in cloud servers.

AI Recommendation System Architecture – Leo CXL Memory Expansion Use Case

AI Inferencing: Recommendation System

73% more recommendations per second

Learn More
Data Center Server Hardware – AI Infrastructure Powered by Leo CXL Memory

AI Inferencing: Chatbot Services

40% faster time to insights with LLM

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High Performance Computing Cluster – HPC Workloads with Leo CXL Memory Expansion

HPC: Computer Aided Engineering

50% more iterations per second

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AI Data Center Infrastructure – Astera Labs Leo CXL Memory Platform Solution

In-Memory Databases: Transaction Processing

150% more transactions per second

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Leo CXL Smart Memory Controller E-Series – Product Hardware Photo

E-Series

  • Memory Expansion
Leo CXL Smart Memory Controller P-Series Product Photo – Astera Labs

P-Series

  • Memory Expansion
  • Memory Pooling
  • Memory Sharing
Leo CXL Smart Memory Controller Board – Top View Hardware Detail

Leo A-Series Hardware Solutions

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

  • PCIe x16 CEM add-in card form factor
  • 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 controller and memory
  • RDIMM fault isolation and error correction
  • High volume production-qualified solutions with robust supply chain

Use Cases

CXL Memory Disaggregation Diagram – Leo Smart Memory Controller Use Case

Memory Disaggregation

Expand, pool and share memory between multiple servers to increase memory bandwidth and capacity while providing the option to reclaim stranded or under-utilized…

Resources

Ordering Information

Orderable Part NumberImageDocumentsDescriptionCXL SpecCXL LinkMemoryCapacityExpansionPooling / SharingOrdering
A1000-1254ABA1000-1254ABhttps://www.asteralabs.com/wp-content/uploads/2025/05/Leo_CXL_Smart_Memory_Controllers_Portfolio_Brief.pdfLeo A1000 CXL™ Smart Memory Add-in Card CXL 1.1/2.016x32G4x DDR5-5600 RDIMM slots, 2TB2TBYesYeshttps://www.asteralabs.com/product-details/a1000-1254ab/
CM5082E-*CM5082E-*https://www.asteralabs.com/wp-content/uploads/2025/05/Leo_CXL_Smart_Memory_Controllers_Portfolio_Brief.pdfLeo E-Series CXL 2.0 x8 Smart Memory ControllerCXL 1.1/2.08x32G2ch DDR5 Up To 5600MT/s2TBYesNohttps://www.asteralabs.com/product-details/cm5082e/
CM5162E-*CM5162E-*https://www.asteralabs.com/wp-content/uploads/2025/05/Leo_CXL_Smart_Memory_Controllers_Portfolio_Brief.pdfLeo E-Series CXL 2.0 x16 Smart Memory Controller CXL 1.1/2.016x32G2ch DDR5 Up To 5600MT/s2TBYesNohttps://www.asteralabs.com/product-details/cm5162e/
CM5162P-*CM5162P-*https://www.asteralabs.com/wp-content/uploads/2025/05/Leo_CXL_Smart_Memory_Controllers_Portfolio_Brief.pdfLeo P-Series CXL 2.0 x16 Smart Memory Controller CXL 1.1/2.016x32G2ch DDR5 Up To 5600MT/s2TBYesYeshttps://www.asteralabs.com/product-details/cm5162p/

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