1) Which of these would be better?
As far as i can tell it's 7000MHz vs 8000MHz and the second sounds better however if i divide per 1000MHz then cost wise per thousand it's 28.571 vs 32.5 so the first seems to have more value if i purcashed lots?
2) Are there any decent step by step tutorials for building a home based mining rig?
3) Which is the best value motherboards etc that are compatible for making a rig with these cards?
4) Are these good for mining other coins like litecoin, dogecoin and new altcoins?