For a gaming PC, I guess, you should buy a high-end gaming one with Intel six-core processors. For a demanding game, my nephew recommended this specs: CPU: Intel Core i3 or AMD Athlon II (K10) 2.8 GHz , RAM: 4GB , GPU: GeForce 2xx Series or AMD Radeon HD 5xxx Series with OpenGL 3.3 HDD: 1GB. I...