guys i m mining via nicehas software with gtx 1070 and 970 thats ok. but i have
1 x E5-2620 V3 2.4 - 6C 12T
1 x E3-1220 v3 3.1 - 4C 4T
1 x i7-6700 3.4
4 x i5-6500 3.2

and i dont want to waste these CPU powers. How can i use it. Beyond all costs i wish like to know

1- which coin, software, pool or wallet should i use. (prefer no software just command system)
2- i have already a wallet on nicehash but there is a small depeosit fee is there any good alternatives.
3-Generally using win7 x64 or server2012 on them. should i install a linux or Ubuntu OS (in servers if i do it on virtualization will it decreese of my mining rate)
4-which period they are making transfers to wallet i mean after reached 0.001 LTC or 0.00006 BTC etc.

need your guidance. Thank you for all interest.

Note: Im searching about VRM #1 - poolinat0r.com and VRM #2 - poolinat0r.com