A computer’s core configuration refers to its most important parts. These parts include the CPU, RAM, Hard Drive storage, and other components that increase capability such as USB ports, DVD Drives, Blu-Ray Drives, and IEEE 1394 ports (FireWire). Ask yourself what you need this computer to do.
If you take and store many pictures, you need accessible ports such as USB or eSATA and you need plenty of hard drive storage. If you are into hard-core gaming, you need lots of processing power, RAM, and a high-powered video card. Do not just settle for the configuration the manufacturer suggests you buy. Those prefabricated PCs are designed to appeal to the average user and typically benefit the manufacturer more than the end consumer.