My son is into gaming on PC. We bought him a decent PC for gaming knowing it is needing some upgrades. He has been saving up and now after Christmas he has enough money to get the PCU he's been eying. I'd love to help him with knowledge but I don't play games on computers. If a computer isn't doing something right I turn it off and back on again. If that doesn't work I'm screwed. He's got about $800 dollars. Any recommendations?