sorry i make a mistake about the value of the Size,
with Infiniband as Link Type i got a bandwidth average with a value between 3630 MB and 3700 MB (28.35Gbit and 28.9 Gbit) for 64 Kbit up to 8 Mbit Size (Not 8 Gb and 80 Gb) and i make a measurement from 1000 iteration for each Size.