I'd say cleaning your PC out once every couple of months shouldn't be a problem for any tech lover.
I disagree. While the desire to keep the interior of the computers clean will likely be there for any tech lover, that does not mean cleaning is an easy, no-problem task - by any means.
Computers are big, heavy, unforgiving metal boxes, with lots of cables attached, in back, often difficult to reach. Computers are often located in cubby-hole compartments.
One should never clean the interior of a computer without first disconnecting power to it.
One should never "blow out" the interior of a computer inside the house. It makes no sense to blow that stuff back into the air where it will be sucked back into the computer, not to mention our lungs.
One should never use a vacuum cleaner to clean the interior of a computer unless they are VERY aware of the hazards of ESD and take the essential prevention precautions. Air and dust particles slamming into the nozzle end can easily generate many 10s of 1000s of volts of static electricity that might then be discharged through and destroy ESD sensitive devices like CPUs, GPUs, RAM modules and more - all without us mere humans even being aware a static discharge even occurred.
It is essential to note a ESD (electrostatic discharge) can easily torch a Grand Canyon sized trench (microscopically speaking) through millions of transistor gates, and still be so tiny we humans cannot see, feel, or hear that a discharge (zap!) even occurred.
We only use a vacuum here if it is raining sideways outside. And then we take extreme caution to avoid the nozzle from getting too close to anything that might be ESD sensitive - then use a soft "natural" bristle (never synthetic) brush to gently brush the dust towards the nozzle end.
This means to properly clean a PC, one should break it down (unplug all cables), lug it outside and blast it out with compressed air. Those cans of dusting gas work, but can get expensive and don't have much force behind them. Plus, they do NOT contain "air" but instead hazardous refrigerants like difluoroethane that should not be inhaled.
Alternatively most professional electronics repair facilities use compressed air from an air compressor. This is what we do here. HOWEVER, one should always, as in EVERY SINGLE TIME - use a
inline moisture and particulate filter when cleaning electronics (or air-brush painting birthday cakes or faces).
And never see how fast you can make a fan spin - you can easily exceed design limits and damage the bearings (I use wooden glue/Popsicle sticks to hold the blades stationary).
In any case, this is not walk in the park to properly clean the interior of a PC - especially if lugging a big, heavy metal box outdoors is physically challenging, as it is for many. Just another reason to make sure all cases in the future have good, removable, washable filters.
i rather have an "airfilter" (of some sort) treating all air inside so i have cleaner air to breath/less dust in the house, than try to reduce dust in my case by things like overpressure/special mesh.
And if that works for you, then that is great. But for many others, it is not that easy.
I agree a good (and clean) whole house filter will greatly reduce dust build-up in a home. But there are many other variables involved.
The number of animals (human and 4 legged) in the home shedding dander and hair makes a HUGE difference in the amount of house dust being created. Most of that falls to the floor where walking and running stirs it up, ready to be drawn into computer cases by the fans.
The number of people and pets affect how often the exterior doors are opened (letting dust in).
The climate in your area dictates whether or not you open your windows, and for how long.
The hours per day your computer fans are running is a factor.
There are many more factors that may or may not affect others.
As for over (positive) air pressor inside the case, that is still desirable
"IF" you have air filters on your case. A "
slight" over pressure helps ensure that vast majority of air being drawn into the case goes through the filters. If there is a negative (under) pressure, even a slight one, the fans will create a vacuum, suction inside the case and that will draw air (and any dust it contains) in through every crack and crevice in the case, including through unused ports and slots in the case and the motherboard's back panel ports too.