What sets gaming PCs apart from common work PCs, is that, in additional to having higher specs for almost every part, they have a dedicated graphics cards. A gaming system generally cannot get by on anything less, as integrated graphics simply lack the raw processing power to handle the graphical demands of modern games.
Also known as video cards, or GPUs (Graphics Processing Units), graphics cards represent the most notable expense incurred by gamers. The high cost of graphics cards is reflective of a niche market reserved for gamers on the one hand and visual creative professionals on the other.