PCI E ,USB,1394“接口”的带宽计算

1. PCI Express 

PCIE*Gen1 
2.5Gbps*(8b/10b編碼)/8=250MB/s每位,x16:max 单向Bandwidth=0.25*16=4GB/s 

PCIE*Gen2 

5G*(8b/10b編碼)/8=500MB/s 每位, x16: max 单向Bandwidth=0.5*16=8GB/s 

PCIE*Gen3 

10G*(8b/10b編碼)/8=1000MB/s 每位, x16: max单向Bandwidth=1*16=16GB/s 

2. USB 

USB 1.1

12Mb/s*(8b/10b編碼)/8=1.2MB/s 

USB 2.0

480Mb/s*(8b/10b編碼)/8=48MB/s USB 3.0: 5000MB/s*(8b/10b編碼)/8=500MB/s 

USB 3.0

5000MB/s*(8b/10b編碼)/8=500MB/s

3. 1394 

1394a

400Mb/s*(8b/10b編碼)÷8b =40MB/s 

1394b

800Mb/s*(8b/10b編碼)÷8b =80MB/s 

1394-s3200 spec

3.2Gb/s*(8b/10b編碼)÷8b =320MB/s