I couldn't agree more to the list, especially the PSU part.
I'm currently running XTR850 80+ GOLD. PC draw 550W from wall so that is approx 65% of max power of PSU. In case I want to add more cards or buy more power hungry I would definitely change the PSU for stronger to stay within 70% of power draw.
I think the PSU like the heart. People or animal with strong heart will live longer for sure.
I'm new to mining, I just started mining the new Gopnik Coin for fun but I was told it's really not efficient because it is a Scrypt algorithm.
So if I understand correctly, I should be mining ZCash with GPU? I have AMD R9 280X, does this even matter? ZCash is the most profitable for all GPUs?
Try to research here
https://bitcointalk.org/index.php?board=159.0 and you will find your answer. IMO, find new potential coins have best algorithm for your cards and low diff.