Build a Gaming PC for $350 - February 2013. All prices are from Amazon.com as of 1/22/2013. Expect these to change on a very frequent basis. In this video I give you a guide on how to build a cheap gaming computer for $350. This build is a great entry into PC gaming and delivers better performance than an Xbox 360 or PS3 with a focus on 720p gaming although 1080p is possible with titles like Team Fortress 2 and Portal 2. My Video Gear.