Gainward GTX 1660 Super Ghost - 2021 mining with unboxing + real sound test 

those are just case lights and you can connect them directly to the motherboard.

31

I bought 1 it's 31.7 for -502 in windows and -1004 in hive os

The hash rates varies, between 31.2 to 31.7 depending on your mining software, and if you underclock to GPU VRAM. Otherwise the normal Hash rate is between 22.5 to 26 max (no overclock or downclock)

I used before Hive os, and I do not like it especially that you must pay after the 3rd rig...

you mean power consumption?