Hi

I m planing to setup Rig mining for ethr or litecoin

just for trail i m planing to install 2 MSI GAMING RX470 4GB on my existing mother board

what Mhz will this 2 gpu give me
 
also how much time it will take to mine 1 eth or 1 litecoin

also please suggest me which software to use and how to use and video tutorial will help