Ideal mining Setup pro Licence is 4cpu threads 
not more not less. It's fair for newcomers too, so let us keep the Fermat Spirit alive, and enjoy Mining!!
what to put in IoP.conf file to mine with 4 threads?
Ok so how to mine with 4 cpu threads.In config type gen=4 and in debug generate 4 ?
gen=4 has no effect whatsoever, only command accepted is gen=1 to mine on one instance or gen=0 to stop mining
instead u run 4 different instances (daemons) with different ports on IoP.conf
IoP.conf example:
daemon=1
listenonion=0
listen=1
rpcuser=random
rpcpassword=random1122
port=14771 -> change last digit for next instance (IoPd/qt)
rpcport=18771 -> change last digit for next instance (IoPd/qt)
server=1
debug=0
addnode=52.43.229.240:4877
addnode=ham1.fermat.cloud:4877
addnode=ham2.fermat.cloud:4877
addnode=ham3.fermat.cloud:4877
addnode=ham4.fermat.cloud:4877
addnode=ham5.fermat.cloud:4877
#we are mining !!
gen=1
minerWhiteListAddress=whitelisted address
genaddr=where to send mined coins