Compute Express Link

Compute Express Link (CXL) is an open standard for high-speed, high capacity central processing unit (CPU)-to-device and CPU-to-memory connections, designed for high performance data center computers. CXL is built on the serial PCI Express (PCIe) physical and electrical interface and includes PCIe-based block input/output protocol (CXL.io) and new cache-coherent protocols for accessing system memory (CXL.cache) and device memory (CXL.mem). The serial communication and pooling capabilities allows CXL memory to overcome performance and socket packaging limitations of common DIMM memory when implementing high storage capacities.

Compute Express Link
Year created2019 (2019)
No. of devices4096
SpeedFull duplex
1.x, 2.0 (32 GT/s):
  • 3.938 GB/s (×1)
  • 63.015 GB/s (×16)

3.0 (64 GT/s):
  • 7.563 GB/s (×1)
  • 121.0 GB/s (×16)
StyleSerial
Websitewww.computeexpresslink.org
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