> because you can't buy a not-powerful discrete graphics hardware options?
I'm not sure that's true. I have a Radeon card (HD 5450, I think) which I bought specifically because it has passive cooling - and was cheap. I wouldn't call anything with passive cooling "powerful", although it's definitely much more powerful than the crappy IGP I have on my (several years old) motherboard. I still have to objectively determine its performance though, and that's why I'm not sure :)