what is the current best miner for this cpu intel celeron 550 2ghz on windows 32 bits (i know it is an old machine, but i don't pay any electricity)? but for i5 750 3,8 ghz on windows 64 bits? and for core i7 4720hq on windows 64 bits?
What is the current best miner for this nvidia gtx 260 1792mb and for gtx 970m?


How can i configure xmrig for cpu?

Thanks.