You ought to be ashamed of yourself.
If the landlord left his house unlocked, would you take advantage of that as well? Maybe help yourself to some valuables, maybe a bite to eat?
People like you make the world a worse place to live.
Are you joking? Stop being jealous wussy because you don't have free power.
OP -- 5850s bro, cheap mobo, cpu, 1gb ram, 40gb hdd, get 5850s or 7970s. 5970s if you must but NOTHING else or you will regret it! Trust me!
always get gold rated PSU and a good 750w can power four 5850s just fine, or two 5970. Don't push it, just get more rigs if you want more cards. It's not a big deal.
A lot of people around here think they know what they are talking about. Be careful who you listen to!