The new Radeon HD 4850 X2 that is being launched today is simply two Radeon HD 4850 video cards in a single board working in CrossFire mode, being a cheaper option to the Radeon HD 4870 X2, which is the most expensive video card available today, and priced to compete with GeForce GTX 280. How is the performance of Radeon HD 4850 X2 compared to GeForce GTX 280 and other high-end video cards? Does it provide a good cost/benefit ratio? That is what we will see in our review.