For my 3 card GTX 1080 ti rig I am using windows 10 pro. Just to have the flexibility to switch between zec, eth, and other alts.
Just curious, what are you parameters for switching to a different coin? Or do you do it manually based on whatever the stats are? Ive got mine narrowed down to zec and eth but wondering if I should just stick with one for a while. ETH seems to generate the most $ for my rig right now. Id like to add more cards and possibly another board (eventually)
It is more based on what hardware I can get going at the best price. I have a couple of 6 card rigs with older gigabyte r9 280x that do zec at 1800 Sol/s at 900 watts. Not the most power efficient but for a 4 year old card not bad and they can be purchased for $100 each. You could get a 6 card rig going doing zec for around $1000. They don't do so well at eth mining.
For eth I have a couple of rigs with gtx 1070 cards that do 180 MH/s. R9 Fury's do well at zec but at a power cost. If power is not an issue a Fury will do zec at 450 Sol/s and eth at 30 MH/s. Not bad for a card that you can get for around $275.
My new build of a 3 card 1080 ti machine is for mining zec at 2100 Sol/s at 600 watts. Right now the mining diff between coins on this setup is not big so I choose to do zec. But if eth mining become more profitable by a big margin then I will switch.
I know people trash old cards but you can get deals on them and build a decent rig on the cheap. Also the R9 280x are bullet proof. I ran my rigs for two years mining LTC before switching last year to mining eth and then three months ago to zec. I have not had to rma any of those cards and I do an occasional dust cleaning of the heat sinks and fans. This is all the maintenance I do. I don't re paste the gpu.