How to Build a Gaming Computer on a Budget

Buy the necessary components. Many retailers often sell entire kits at a discount with almost everything you need to build a computer. If you already have some of these components, such as a keyboard, mouse or operating system, you will be able to save some money. The primary difference between a gaming PC and a standard one is the inclusion of a video card, as well as usually more RAM and a faster processor.

Open the case and install the power supply. There will be occasional differences among cases as to how exactly this is done, but most of the time, you remove the left side panel and mount the power supply in the top rear of the case using four screws.

Install the motherboard and connect the power supply. Screw the brass standoffs into the interior of the case where the screw holes on the motherboard line up. When mounted, the ports on the motherboard should match the backplate and the expansion slots should line up. Once four to five standoffs are prepared, screw the motherboard down into the case and connect the power supply according to the motherboard manufacturer's instructions.

Install the processor and heatsink on the motherboard. Be very gentle and hold the processor by the edges as you insert it into the socket. There is a missing contact on one corner to ensure that it is lined up correctly. Once it is in and locked down, apply thermal paste and attach the heatsink.

Install the video card. Remove the cover plate from the rear of the case over the slot where the video card is to be installed, then insert the video card and screw in the mounting bracket. Depending on the video card, you may have to connect it to the power supply as well.

Install the remaining components and connect them to the motherboard as necessary. The hard drive and optical drive will mount in brackets. Depending on the case, they may need to be screwed in. They are each connected to the motherboard and the power supply. The RAM is inserted into the slots on the motherboard. Once lined up, gently push down until it locks into place.

Replace the side panel of the case and connect it to your keyboard, mouse, monitor and power cable. From here, your computer is officially built and you can proceed to install your operating system and games of choice.