Is mining still profitable.
Electrcity bill is high and how much money can I earn per month with 3 cards
Each rig will be able to add the 6 cards with the one PCI riser in one rig. Profit is based the on the which card you are choosing to start mining, there are many online mining calculator dude.
Use any one the calculator to check the profit you can make with the investment ability and cost consumption of the electricity.