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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


Last update: March 2, 2018

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