Well its full of dust. I have a CM690 and my tuniq tower is full of dust and there is dust everywhere . I don't want to take everything out but am I going to have to clean every peace one by one ?
Make sure you read the thread about ESD and follow the guidelines there before you start messing around with the insides of your computer - that means no vaccum cleaners!!!
Every 3-4 months I remove the side panel and clean the insides with q-tips and paper towels. Every 18 months I take the whole system apart and clean everything, sometimes it seems like my computer is competing with the Roomba as to who can collect more dust...
I think that it is more important to prevent dust in the first place. Here are some guidelines:
1. Keep your computer away from dirt. Smoke, carpeting and pets all fall under this category. The farther away from the floor the better.
2. Use filters. If your computer case came with filters, use them.
3. Low airflow. If you can lower the airflow into your case, do it. The more air going in, the more dust that goes in as well. There is no need for 8 fans sucking 1100CFM into your case...
Personally every year or so I just take my computer outside stick some thing in the fans, to prevent rotation, and just use a leaf blower on it, it works quite well and no need to clean up afterwards since your outside.
I went and bought some filters from Lowes (the cheap ones that come in a 4 pack for like 2.xx. I put those on the outside of all my fans that are blowing in air from outside the case. That cut down on alot of dust and air flow into the case as well as the filters are kind of thick. Every few months, I take off the side panel and take q-tips to the fans to clear off any dust that's on them. Just remember to replace those filters like once a month just like your house filters.
If you have it available, compressed air is the easiest thing to use - far better than a vacuum, but also dangerous if you aren't careful with it. A nozzle used for inflating basketballs works great, enough air to clean, but not enough to do damage. Also, using this method, you don't need to disassemble any of the components, just remove the front & side panel(s).
Even with a filter on my comp's intake, I still take it apart every few months and give it a shot of the air compressor; keeps both of us happy.
Yikes, I just read the ESD guide....I guess I should stop vacuuming my computer. I've been doing it semi-annually for 3 years, luckily no problems so far