OK guys, no need for these attacks. It's a perfectly valid question.
Hanzu,
- Have you confirmed that it's the case fans causing your problems? I would imagine the fans on those GPUs, and possibly the PSU would be drowning them out.
- Are the fans thermally controlled? You may want to turn them down if possible
- Is there any one fan in particular causing problems? It could be a single faulty bearing or loose fan causing your problems.
- Are your temperatures OK?
- It would generally be a cheaper and more effective solution to replace the fans in the case rather than the case itself. The P180 is actually known to be quite good from a noise point of view.
Having said all that, you have a very powerful system there. The converse of that is that it also draws a lot of power, even when idling, which eventually ends up as heat that must be blown out of the case. High efficiency power supplies can help, as can implementing power saving features, but at the end of the day there's still a considerable amount of thermal energy to be removed.