CPU as an option = OK, cause some of us have pretty high energy costs or don´t like to stress the CPU
Anyway.. everyone should be ok with paying a few bucks / month for your great work.
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Maybe this helps someone else one time..
I have disconnects for almonst 24h now... rigs are going offline altogether and back online in a few seconds... every few minutes.
First guess.. my internet connection.. checked cables etc etc.. nothing found.
Router, switches... nothing...
So I wrote our Admin and he figured it out like always.
Mouseover "ONLINE" in SM.. if your uptime looks alright (weeks, days, 10 hours...) than your connection is fine. In my case it seems to be a problem with my ISP (internet connection) and the SM server.
Means my rigs are up and running, sending shares etc etc... my rigs have problems reaching the SM server only.. but that shouldn´t affect the mining process.