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RE: Building an Easy GPU Mining Rack using scrap wood!
0 cost is what makes it cool.
I think mining rigs give really good ROI when comparing it to other kind of investments, like real estate which usually takes around 15 to 20 years to break even.
I got a bellyRub and this comment has received a 4.03 % upvote from @bellyrub thanks to: @sticker.