The two factors that must be considered are: the price of the case and the size of the case.
The first thing to consider is the price of the chassis; the chassis price span from a few hundred dollars to a few thousand dollars have, so before you buy the chassis to determine the price of what they have in mind.
The next thing to consider is the size of the case. Since most people don't need a 3.5-inch floppy drive anymore, you can consider smaller models when shopping. Also take into account the possibility of adding an optical drive or some card readers, etc. in the future, in the case of the interface to be properly considered.
Expanded:
Materials
Good chassis front panel of the plastic are used is made of ABS engineering plastics, strong and stable. If the plastic used in the chassis is not hard enough, or very brittle and easy to fracture, the quality is definitely a problem. Steel plate should be at least 0.5 mm or more, the material should be galvanized steel, hardness and elasticity, if the thickness is not enough or a little force can be bent certainly not a good material.
Workmanship
1, look at the steel plate frame whether there is a burr, sharp mouth, good chassis are often wrapped, at least through the sanding process, will not allow you to install the machine "bruises".
2, look at the chassis frame is solid and stable, the easiest way is to lift up and shake, if there is shaking or even deformation, certainly not good.
3, to see whether the internal production is professional, such as the installation of the motherboard when the chassis on the location of the punch hole, whether the size of the match, drive slot and card positioning is accurate. Four look at whether the EMI contacts, that is, the side panel around a number of small protrusions. This can reduce electromagnetic waves, favorable and human health.
In short, the important thing to choose a computer case is to look at its materials, workmanship and practicality, and definitely do not be confused by the appearance of the fashion.
Convenience
1, the front should have a USB port and 3.5 headphone port. It's best to also have an IEEE1394 port and a SATA or ESATA port.
2. At least 4 optical drive ports and 4 hard disk ports.
3. Whether it is easy to carry.
4, the way the chassis cover opens.
Baidu Encyclopedia - Computer Chassis