they are ?
cool

A dust free case doesn't exist. Don't waste your time.

Your best option is to buy a case that has easy to remove dust filters for all the fans. You can slide them out and blow on them with compressed air, then slide them back in. Depending on your environment, and whether you have pets, or smoke, you probably only need to dust out the case every 2-4 months.

It just comes with the territory. The only other thing you can do is reduce the amount of dust in the room. But it still won't eliminate it.

Here's another good article about oil cooling, for anyone interested:

<span class="bold">Instructables:</span> Mineral Oil Submerged PC

I use a Coolermaster HAF 932 and i'm very pleased with it. It has dust filters in the front air intake which i clean from time to time (easy to do since the case can be easily dismantled) and i made a DIY filter for the bottom of the case where another opening for a fan exists (but i don't have a fan installed there). Basically the case is open from all but one side but surprisingly enough, i have to clean it only once a year (before the summer). But then again, it has only slight dust inside..

My previous case (a cheap basic case) in my previous PC did have only two small openings (intake in the front - exhaust in the back where the PSU was) but it attracted so much dust... like it was some air purrifying machine!

And as others said, 100% air-cooled dust free case doesn't exist. Go for one with air-filters or make yourself some! ;-)

I'd prefer something less bright, easier to maintain and expand, but... it.. it's just beautiful!

I bought a Coolermaster Cosmos SE last month. It's slightly expensive but I like the Cosmos design this one is fully filtered from bottom, front and top, the filters are also very easy to clean. Comes with 2 front fans, 1 top fan, 1 exhaust fan.

Cable management is also pretty good inside the case, the right panel behind the motherboard has decent space for cables and there's lots of holes for cables ties. Pretty good case overall, I'm happy with it.

http://assets.coolermaster.com/global/uploadfile/upload/images/case/cosmos_se_v2_3.jpg

A submerged PC is pretty good. It dispels heat like no one's business but requires you to change the coolant every so often, which can be a pain. Still...
EDIT: It WAS somewhere inthis thread. I just missed it in my quick skimming.

A former colleague of mine (in IT support no less!) looked at a video of an oil-submerged PC and honestly enquired whether you could keep fish in it.

Yes mate, fish just bloody thrive in warm oil, ask any chip shop...

Besides which, imagine the carnage if one got stuck in a fan...

it does look awesome. then how you gonna maintain it at clean state?
the tank is cool but what's about over-heating problem? should I expect oil will calm everything down but not set a fire?

The logical reason I think about air purifier is the filters, either negative or positive, cannot produce dust except it's from outside. So the surrounding environment MUST be clean, no dust, no mold, no allergens. Hence air purifier will be the ultimate solution. But ionizer type is just a troublemaker so Clair is outstanding a bit because at least it does not make more allergens and particles fallen on carpet.

Dust free?

http://img.pandawhale.com/post-46067-charlton-heston-laughing-gif-I-M2zI.gif

According to <span class="bold">this video</span>, with a Phenom Quad core @ 3.4 GHz, a Radeon HD 7750 and a 128GB SSD, you get the following temperatures:

Idle:

HDD: 40°C
CPU: 40°C
GPU: 41°C

High load: (100% GPU usage)

HDD: 40°C
CPU: 55°C
GPU: 64°C

Sorry to have used my dark necromancy powers to resurrect this thread but I chanced upon it while searching for something unrelated about gaming pc, isn't the search function wonderful!

Last year my dad's PC started developing problems, it's an old machine running Windows XP that had not been opened since the day it was built so I expected it to be packed with dusk. It was however cleaner than mine after a thorough cleaning.

My dad is a bit of a neat freak and when he cleans up his apartment every week he does not cut any corner, he also dust off the computer and everything near it including wiring, I know this because of the number of times a loose wire at the back was the cause of an issues he was experiencing. I do know he never opened the thing to clean up the inside.

So I suspect a way to have a dusk free computer is to simply make sure to not let any dust ever accumulate around it even in hard to reach places that most only cleanup once every year if that.