·         Form Factor

·         AT Cases

·         ATX Cases

AT Cases

·         Older Motherboards (pre-Pentium)

·         Advantages

– Well Established standard make.

– Easy and cheap design.

·         Disadvantages

– Inefficient cooling.

– CPU socket location.

– Not suitable for P-II (& higher).

ATX Cases

·         Newer Motherboards (Pentium based m/c)

·         Advantages

– Efficient cooling.

– Easy accessibility for upgrades.

– I/O are fixed onboard