Compute Express Link (CXL) is an open industry interconnect
standard for providing high bandwidth and low latency. It adds
connectivity between host processors, accelerators, memory devices,
and network interface cards (NICs). CXL also enables memory
expansion and acceleration across high-performance computational
workloads for AI, ML, HPC, and communications segments. CXL
uses PCIe Gen 5.0 PHY based high-speed serial link to communicate
between the latest generation of CPU processors.
SMART develops CXL Type 3 (CXL.mem) memory products to
address the industry’s need for more memory per processor core.
The CXL interconnect specification allows for a significant expansion
of memory form factor options leveraged from SSDs. SMART’s
introductory CXL Memory Modules known as XMM’s are offered in
the E3.S form factor.
Memory Modules (XMM)
Key Features
•
CXL-2.0 compatible with PCIe-Gen5 speeds running at 32GT/s
•
Available in 64GB DDR5 memory capacity with expansion
plans up to 256GB in the future
•
Supports Reliability, Availability and Serviceability (RAS)
features added in CXL-2.0
•
Available in EDSFF E3.S 2T (2U short) form-factor.
•
Powered by only 12V supply from EDSFF compatible edge
interface (SFF-TA-1009)
•
Supports sideband interfaces for real-time debug,
management and system update, enabling out-of-band
management of the module
•
Supports additional security features to protect data from side-
channel attacks
Why choose SMART Modular for CXL?
•
SMART is a contributing member of the CXL consortium,
closely collaborating with CPU and silicon suppliers to test for
compatibility and feature completeness.
•
SMART has PCB design, test and assembly expertise to develop
high speed memory and storage modules in variety of form-
factors like DIMMs, E1.S, E3.S and PCIe add-in cards (AICs).
•
SMART’s global manufacturing footprint and strong relationships
with components suppliers minimizes disruption even in stringent
supply-chain conditions.
•
Customers can leverage SMART’s test and validation service for
pre-screening memory modules for reliability and quality.
•
SMART’s experience in other interconnect standards and
technologies like Gen-Z, OpenCAPI and persistent memory
solutions such as NVDIMM-N.
For more information, please visit: www.smartm.com
Customer Service:
T: (+1) 510-623-1231 • E: customers@smartm.com
Headquarters/North America:
T: (+1) 800-956-7627 • T: (+1) 510-623-1231
F: (+1) 510-623-1434 • E: info@smartm.com
Latin America:
T: (+55) 11 4417-7200 • E: sales.br@smartm.com
EMEA:
T: (+44) 0 7826-064-745 • E: sales.euro@smartm.com
Asia/Pacific:
T: (+65) 6678-7670 • E: sales.asia@smartm.com
©2022, SMART Modular Technologies, All rights reserved. The stylized “S” in conjunction with “SMART”, as well as “SMART Modular Technologies” are registered trademarks of SMART Modular Technologies. All other trademarks are
the property of the respective owners. These materials are provided by SMART Modular Technologies as a service to its customers and may only be used for informational purposes. 05.02.22/CXL/Rev.3
Applications
•
Disaggregated pool of shared memory for HPC applications accessible over CXL fabric
•
Secure memory for managing trusted keys and in-memory database
•
OLTP Log Cache Acceleration
•
In-line compression, encryption or vector atomic operations, transparent to CPU while using normal memory load/store semantics
•
Targeted for 2U servers to enables memory expansion with up to 16 E3.S modules in single 2U server achieving better throughput than
direct attached DDR5 DIMMs.
•
Total Memory = 3TB (DDR5) + 2TB (CXL)
per server
•
Theoretical maximum bandwidth of 768GB/s
(DDR5)+ 252GB/s CXL XMMs
•
Bandwidth per core = 5.3GB/s (higher even with
more CPU cores)
8
x 2
56G
B
CXL memory modules (XMMs)
Future
G
eneration con
f
i
g
uration – 2022 Dual socket server with 96 core
C
PU and 12 x DDR5 channels
p
o
p
ulated with 128
G
B DDR5 DIMMs
in 2 DIMMs
/C
hannel
CPU
CPU
Ordering Information
CXL Memory Module (XMM)
SMART Part Number Description
STXAB64GMF4S40SB
64GB ASIC based CXL-2.0 E3.S Memory module with dual ranks/channel x64 + ECC DDR5
Suitable for low-latency memory expansion
STXAB64GXK4S36SA
64GB FPGA based CXL-2.0 E3.S Memory module with dual ranks/channel x64 + ECC DDR4
User customizable FPGA logic for adding in-band acceleration functions like compression and encryption
STXAB12GXK4Q18SM
128GB FPGA based CXL-2.0 E3.S Memory module with dual ranks/channel x64 + ECC DDR4
With user customizable FPGA logic for adding in-band acceleration functions like compression and encryption
Contact: Arthur Sainio at Arthur.Sainio@smartm.com for any sales and sampling queries.