a PC case is recommended for noobs and people who will want to
be bother with the PC after set up. these people aiyo feel that if
the case can hold everything proper not hazrds accident okay why
not case better.
however a PC case is important becasue:
it holds everything inplace and tidy up the hardware to prevent
possiblilty of the components inside coming into contact and
shocking one another. it also prevents the user from coming into
contact and got shock of spill water or liquid on the parts inside.
it makes transportation of the setup pone place to another
convenient. it tidies up your desk and slow down duct collection on
the cards.
very importantly a metal PC case grounds out all the components in
the computer and prevents emi leakage and thus interference to all
class B home appliances. without a pc case, the computer parts if
place near to a tv or other household applicances may interfere
with their operation.
a case also hold the opticcal drive firm and flat on the table to
minimize shock and vibration which may affect the spindle action.
unless your optical drives are those vertical loading type you may
not want to play around with a setup as shown by gordon's
peektures.
modders out there prefers stacked open trays like this
because it makes swapping of components and hardware
easier and maintenance on the fly. just unplug all the cables and
bring it put doors with a good spray to dust off the dirt.