Are you really thinking mining bitcoin with USB miner?
Those bitmain antminer have a max 2.2GH/s (overclocked).
3 x 2.2 = 6.6GH/s
Those will be plugged into your computer.
If you have free electricity, you can make around 3$ in 1 YEAR! (depends on how price goes, etc etc)
But i guess you don't have free electricity, so you will get a loss instead of profit.
According to this article: (
https://www.griffith.edu.au/sustainability/sustainable-campuses/sustainable-initiatives/energy/average-computer-energy-usage), "
An average desktop computer has a power usage of between 80 and 250 watts, depending on graphics cards and additional peripherals.".
I mean my PSU has 750W (of course it can deliver 750W, it's not using them all), but i'm probably using around 400W-500W.
But let's follow the article, and even if you are using only 80W and if you pay $0.10 per KW/h, your loss would be around $-67.22.
Does it worth? Nah it doesn't. You're reducing the life of your computer components for nothing.
