With all the heat and electricity it isn't even worth mining anymore. For SHA-256 at least.
I take it you think scrypt is more profitable? Are you kidding me? Have you done the math? BTC mining with ASIC's is way more profitable than scrypt per watt used.
GPU mining is a total waste of power and resources. You need a whole computer to GPU mine. It takes up more space than ASIC's. It produces more heat than ASIC's. It's also makes more noise. Anyone who is building new gpu rigs has not down their homework. Guess math is too hard for some.
Even though altcoin profitability changes constantly, if you take a quick look at coinwarz.com, it would take 1600kh/s mining some unknown alt to even get close to the profit an antminer makes each day. Wouldn't that be at least 2 gpu's, plus the rest of the computer, and how many watts would that take? Compared to just over 400watts from the antminer.
I will be waiting for anyone who wants to lay down some numbers on scrypt vs sha mining to prove me wrong or right.
Even while I was typing this, profitability has changed and you now need 3200kh/s to equal the profit of 1 antminer..