It's not worth it. What the guy said is true, they're basically the same chip. Sapphire itself is just a really trustable and reliable brand, with Vapor-X being a good cooling system, thus making the vapor-x 7970 ghz more popular than most others (And it also looks pretty sick compared to others). The HIS IceQ X^2 also has a really good cooling system. It's really not worth any extra money.