help Gpus miner

[Kru420]

hi,
if i use z97 motherboard
GTX970 5way to mining
so memory configuration and how much power supply will be better?

do GTX970 needs use SLI, or not?

sorry I do not understand these
can somebody help me to build my gpu miner?

i will mining many kinds coin
not fixed

if i mining ETH how build GPUminer, like whole computer

thank you!!