Originally posted by: mooncancook
not worth it even if i have the budget because of the heat and noise the extra card generated, the real estate taken (4 slots at least), and the fact that a single top of the line card can handle any game you throw at it. Make less sense if you are on a tight budget, save the money towards a next gen card or some great games.
It makes sense if you basically need the absolute best at any particular time and have a high resolution monitor (and are willing to part with ridiculous amounts of cash, of course). Also, it would only take 4 slots with 6800U's....6800GT's are almost always one slot (each), as far as I know. Although yes, at this point with the next-gen stuff around the corner, it would make more sense not to invest in such a setup.
Edit: I can (and do) choke my single 6800GT very easily in newer games with higher settings at my monitor's native resolution of 1680x1050, which is why I eagerly await the next-gen stuff. While I personally wouldn't spend $1k on video cards, some people would, and as I've pointed out, it provides definite advantages to those who need it (high resolution gaming, basically).