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Interconnect Technology Comparison

Interconnect Technology Products or Vendor Physical Domain Cache Coherent Access Semantic Maximum Bandwidth Medium Latency
Gen-Z78 N/A Cross components ✖️ Memory 32 GBps ~ 400+ GBps
Unidirectional
<100ns
OpenCAPI7 IBM Power9 Motherboard ✔️ Memory 50 GBps per lane
Bidirectional
?
CCIX7 N/A Motherboard ✔️ Memory 32/40/50 GBps/lane
Bidirectional
?
OmniPath910 Intel KnightsLanding Cross networrk ✖️ Network 25 GBps/port
Bidirectional
?
PCIe 3.0 A Lot Motherboard ✖️ PCIe ~1GBps/lane12 4B Read ~756ns11
PCIe 4.0 Soon Motherboard ✖️ PCIe ~2GBps/lane ?
IB EDR Mellanox ConnectX4,X5 Cross network ✖️ Network 100Gbps 0.5us
IB HDR Mellanox ConnectX6 Cross network ✖️ Network 200Gbps <0.5us
HyperTransport4 AMD Motherboard ✔️ Memory 51.2 GBps per link
Bidirectional
?
NVLink2 NVIDIA V100
IBM Power9
Motherboard ✔️ Memory 50GBps per link
Bidirectional
?
QPI56 Intel Motherboard ✔️ Memory ? ?
Intel Main Memory Bus Intel Processor ✔️ Memory E7-8894 v4 85 GB/s
E5-2620 v3 59 GB/s
?
Ethernet3 A Lot Motherboard ✖️ Network Mellanox 200Gbps
Cisco ASR 100 Gbps1
?
  • POWER9, NVLink 2.0, 300GB/s


Created: Feb 28, 2018
Last Updated: March 01, 2018