An electronic apparatus and a method of extending peripheral devices are provided. The electronic apparatus includes: a controller; and a plurality of peripheral devices electrically connected to the controller, wherein the plurality of peripheral devices include a plurality of video graphics array display cards, wherein in an initialization phase of the electronic apparatus, the controller allocates input/output resources to a first portion of the video graphics array display cards and does not allocate the input/output resources to a second portion of the video graphics array display cards, wherein the first portion of the video graphics array display cards allocated with the input/output resources is used to display an image in the initialization phase.