Noob explanation for best mining hardware?

pan

Is this a good example?

o0ragman0o

CPU's don't do any work in mining and GPU computer power is very limited in APU's. You'd be better off getting a second hand HD7950 for the same price and dropping in an existing machine.

pan

There's a GPU in it, though.

o0ragman0o

Yes, it should be able to mine, but not efficiently enough to pay for it's own electricity. If it's for a machine that's normally left on doing other stuff as well, then running Frontier might win you a few blocks a month. But again, if you already have a spare PCIe slot for such a machine, you'd still be better getting a decent GPU.