Hi everyone, I am going to buy 2 rx 570 4gb nitro+. Will I make profit with just 2 of those? I will be using nicehash miner, btw electricity is 0.10kwh here. Also guys, please can you give some advice? The miners will be open 7/24, do I need to regularly close them? What C is too high? Is it safe to flash their bios? Thanks in advance! Note: i know they are out of stock but willing to get them in 1 month via /r/BitcoinMining http://bit.ly/2sEzQX5