Purpose-built memory expansion, sharing, and pooling for AI and cloud platforms
Read more Memory Expansion
Reduce TCO and increase CPU efficiency with memory bandwidth and capacity expansion
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Leo CXL® Smart Memory Controllers
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
With multiple DDR5 channels,
up to 5600 MT/s
Seamless
Interoperability Across
Stress tested with all major xPUs and Memory vendors
Enhanced Diagnostics
& Telemetry
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 Inferencing: Recommendation System
73% more recommendations per second
AI Inferencing: Chatbot Services
40% faster time to insights with LLM
HPC: Computer Aided Engineering
50% more iterations per second
In-Memory Databases: Transaction Processing
150% more transactions per second
E-Series
- Memory Expansion
P-Series
- Memory Expansion
- Memory Pooling
- Memory Sharing
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
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Read more 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
Read more CXL Demo for DLRM at OCP Summit 2024
See how Leo and 5th Gen AMD EPYC processors deliver a 70% performance boost for DLRM with CXL.
Read more AI Inferencing Demo with CXL®-Attached Memory: FMS 2024
This award-winning demo shows how AI inferencing can gain significant benefits using CXL®-attached memory.
Read more Leo CXL® Memory Controllers Break Through the Memory Wall
See how Leo CXL® Smart Memory Controllers combined with 5th Gen Intel Xeon Scalable Processors increase memory bandwidth and capacity by 50%.
Read more Accelerating Database Performance with Leo: FMS 2023
See how CXL® memory enhances OLTP solutions with increased transaction throughput, reduced infrastructure costs, and improved user experience.
Read more CXL® Memory Pooling: Industry-First Demo
The industry’s first CXL® memory pooling solution to reduce memory stranding, optimize memory utilization and reduce TCO for cloud servers.
Read more Unlocking Cloud Server Performance with CXL®
The increasing volume of data and complexity of models requires advancements in cloud server architecture to remove memory bottlenecks and unlock the performance…
Ordering Information
| Orderable Part Number | Image | Documents | Description | CXL Spec | CXL Link | Memory | Capacity | Expansion | Pooling / Sharing | Ordering |
|---|---|---|---|---|---|---|---|---|---|---|
| A1000-1254AB |  | https://www.asteralabs.com/wp-content/uploads/2025/05/PB_Leo_CXL_Smart_Memory_Controllers.pdf | Leo A1000 CXL™ Smart Memory Add-in Card | CXL 1.1/2.0 | 16x32G | 4x DDR5-5600 RDIMM slots, 2TB | 2TB | Yes | Yes | https://www.asteralabs.com/product-details/a1000-1254ab/ |
| CM5082E-* |  | https://www.asteralabs.com/wp-content/uploads/2025/05/PB_Leo_CXL_Smart_Memory_Controllers.pdf | Leo E-Series CXL 2.0 x8 Smart Memory Controller | CXL 1.1/2.0 | 8x32G | 2ch DDR5 Up To 5600MT/s | 2TB | Yes | No | https://www.asteralabs.com/product-details/cm5082e/ |
| CM5162E-* |  | https://www.asteralabs.com/wp-content/uploads/2025/05/PB_Leo_CXL_Smart_Memory_Controllers.pdf | Leo E-Series CXL 2.0 x16 Smart Memory Controller | CXL 1.1/2.0 | 16x32G | 2ch DDR5 Up To 5600MT/s | 2TB | Yes | No | https://www.asteralabs.com/product-details/cm5162e/ |
| CM5162P-* |  | https://www.asteralabs.com/wp-content/uploads/2025/05/PB_Leo_CXL_Smart_Memory_Controllers.pdf | Leo P-Series CXL 2.0 x16 Smart Memory Controller | CXL 1.1/2.0 | 16x32G | 2ch DDR5 Up To 5600MT/s | 2TB | Yes | Yes | https://www.asteralabs.com/product-details/cm5162p/ |