Hi
i have 8*MSI p106-100 6GB (The P106-100 is based on the Nvidia GP106 GPUGeForce GTX 1060) which using Hynix RAM

[...] how i can increase our hash rate ?
You can't - Hynix ram is limited to about what you're getting. Any higher and it crashes. The faster speeds you're seeing are from cards with Samsung RAM.
You might be better off mining equihash coins, unless you want to mine and hold ETH
http://miningcharts.com/crypto-gpu-mining/gtx-1060-6gb/equihash-hashrate/