Intel UPI/QPI/CXL带宽计算
Intel QPI和UPI的带宽
- 一条8GT/s的QPI的单向带宽:8GT/s*16bit/8=16GB/s
- 一条9.6GT/s的QPI的单向带宽:9.6GT/s*16bit/8=19.2GB/s
- 一条10.4GT/s的UPI的单向带宽:10.4GT/s*16bit/8=20.8GB/s
PCIe的带宽
- X16的PCIe Gen3的单向带宽:8GT/s*16bit/8*128/130=16GB/s*128b/130b=15.75GB/s
- X16的PCIe Gen4的单向带宽:16GT/s*16bit/8*128/130=32GB/s*128b/130b=31.51GB/s
- X16的PCIe Gen5的单向带宽也是:32GT/s*16bit/8*128/130=64GB/s*128b/130b=63.01GB/s
- X16的32GT/s的CXL的单向带宽:32GT/s*16bit/8*128/130=64GB/s*128b/130b=63.01GB/s
NVLinlk的带宽
- NVLink 1.0有4条Link,每个Link有8个Lan,单向带宽是:20GT/s*4Link*8Lan/8=80GB/s
- NVLink 2.0有6条Link,每个Link有8个Lan,单向带宽是:25GT/s*6Link*8Lan/8=150GB/s
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