My friend's dad recently started mining BTC with his gaming PC while he's not using it. As far as I can see, this kind of mining is not profitable anymore. He gets 40 Mh/s on average and apparently has made about $10 so far. I tried busting out my old Block Erupter USB miner which gets about 250 Mh/s and it hasn't made anywhere near $1. I'm wondering if he's just messing with me or if I'm missing something important. He could be mistaken about what coin he's mining but I'm pretty sure it's BTC.
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Some quick math suggests that mining Bitcoin at 40 MH/s would produce 4 cents per year in revenue. – Nick ODell Dec 12 '17 at 20:36
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See this answer. https://bitcoin.stackexchange.com/a/13674/1878 – makerofthings7 Dec 12 '17 at 20:45
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Mining Bitcoin at 40 MH/s is not profitable.
Unless you get free electricity and consider 4 cents a year profit, there is no point mining Bitcoin with that hash rate.
Does your friend's dad have $10 in Bitcoin from mining with that hash rate? Simply put, no. Your friend's dad could have, however, been mining a different cryptocurrency without knowing. 40 MH/s mining Ethereum produces $3 a day.
Monstrum
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I'm not sure. I know he's using the Nicehash miner but I don't know if that can mine ethereum or not. – CabbageOverlord Dec 12 '17 at 20:50
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Nicehash miner can make about $10 a day mining different profitable coins at
40MH/s. – Monstrum Dec 22 '17 at 22:38