Apart from cost, an IGP is more power-efficient than a dedicated card. Some laptop systems with both an IGP and a dedicated card are capable of switching automatically between them (nVIDIA Optimus and ATI Hybrid Graphics technologies), depending on whether an application requires advanced 3D performance or not, to conserve battery life.
CPU Packaging
CPU packaging refers to the CPU's form factor and how it is connected to the motherboard.
The most popular type of CPU package has been the Pin Grid Array (PGA) chip, designed to fit in a Zero Insertion Force (ZIF) socket on the motherboard. As the name suggests, a PGA chip has a number of pins on the underside of the processor. These plug into corresponding holes in the socket. Care must be taken to orient the CPU correctly with the socket and to insert it so as not to bend ro break any of the pins.
For a while, Intek packaged CPUs ( the Pentium 2 and Pentium 3 ) in a slot-based form factor (Single Edge Contact Cartridge [SECC]87). The CPU was mounted on a card ( much like an expansion card ) fitted to a slot on the motherboard.