Quote: Originally Posted by
smhussain 
Here are my detailed spec's:
3.5 inch hard drive
3.5 inch dvd rom
m2-atx power supply
Just need as small as possible pc case so that my mother can carry it from usa to pakistan.
You haven't answered any of the questions, really.
You need a whole PC case, right? Well, the PC is more than just a HDD, power supply and optical drive. If that's all you have, then carry it all in the original packaging and be done with it.
For a PC case, you need to know the formfactor of the motherboard. KNowing the CPU is helpful also, as some CPUs require more cooling than others, and you would need room in the case for a CPU cooler as well as adequate airflow to bring in cooler air and exhaust warmer air.
And, for the record, optical drives (CD, DVD, Blu-ray) are 5.25", not 3.5".