GPU or CPU is a depreciated product, so if you can't get decent profit then better think twice. But I found the ROI is still acceptable, maybe roughly 1 year or more to earn back your GPU invested.
Nope. The days of 1 year ROI on GPU are gone. Also there is no magic coins.
Now ROI is 2 years if your electricity is free and 3 years if not.
Apparantly I mean the farm of best GPU. Not such garbige as 4670 e.t.c. And not one any GPU in the system block.
That's it. No matter like you it or not.