1) Been browsing through several threads, seems that Gtx1060-1080 / Rx470-580 are mainly the rigs people are looking for. As a beginner who doesn't know how to undervolt/overclock, which GPU would you people suggest me to get for the best $/hash?
I would say Nvidia 1060 cards / less heat in your room
2) Is there risk for OC ing GPU? Would it increase the rate of GPU breaking compare to the original GPU?
yes if you are overclocking your gpu , there is a better chance your gpu is breaking , mostly bc more heat from overclocked components or to much power draw ... but with proper overclocking/undervolting you can reduce the power draw , and the generated heat.
3) Lets say if i built a 6gpu mining rig in my room, my room is not open air and i sleep in my room. Is the temperature good w/o turning on fan/aircond? Is it noisy if i am sleeping in the same room as the mining rig?
Im not sure how big is your room , but one 6gpu rig might can heat up that room , depends on the size of that room , and the air ventilation, circulation. You might need to turn on the ac a couple of times during summer time. Winter time you might can heat up that room with that gpu rig
one 6 gpu rig is not generating that much noise, i think you can sleep from that .
In the winter time i personally using 6-7 or 8 gpu rigs to heat my living room , bed rooms
Guess thats what i need to know now, if you think there are some other important thing that i should take notice on, kindly mentioned it
Thanks and regards
None of those profit calculators you are seeing on the web can tell you what's coming tomorrow , months later or 6 months later or a year later !
Those calculators telling you about today , at that moment when you typing in your information !
If you are starting to get into gpu mining , its not the best time , you have to be ready for a much longer ROI , than a year ago .
Make sure you know how much you paying for electricity kwh/$ with all the taxes