I don't pay for electricity.  I'm just wondering if I should invest in getting a graphics card or whether that will pay off in the long run.  I've been offered several free towers by some friends already, but the problem is connecting them to the internet.  At the place I rent all we have is Wii-Fii so I would need wii-fii cards for each tower.  The other option would be to set them up at school (where I also don't have to pay for electricity) but I'm not sure of the legal implications of that yet.    It might be regarded as a "money-making" venture and therefore not allowed on school property.

From what I've read on this forum one decent graphics card is worth many, many CPUs as far as processing power goes.