Purpose-built memory expansion, sharing, and pooling for AI and cloud platforms
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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
Read more 
Read more Memory Expansion
Reduce TCO and increase CPU efficiency with memory bandwidth and capacity expansion
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/Leo_CXL_Smart_Memory_Controllers_Portfolio_Brief.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/Leo_CXL_Smart_Memory_Controllers_Portfolio_Brief.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/Leo_CXL_Smart_Memory_Controllers_Portfolio_Brief.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/Leo_CXL_Smart_Memory_Controllers_Portfolio_Brief.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/ |