This is how to build an 8 GPU Mining Rig to mine any non ASIC based algorithms. This build is perfect for your first mining rig.
Parts List:
Motherboard – http://amzn.to/2xCfcLM
CPU - http://amzn.to/2wQqVYg
Ram - http://amzn.to/2xCp0FO
PSU - http://amzn.to/2wQHFi7
GPU - http://amzn.to/2yp0vcw
Dual PSU Cable - http://amzn.to/2hvUZhA
M.2 Adapter - http://amzn.to/2wQBt9K
PCIE Riser - http://amzn.to/2yEky7Z
8 GPU Frame - http://amzn.to/2jYVHZ1