The cards from the 3 titans in AMD graphic boards, namely, Asus, Sapphire & Powercolor!

IMG 5294 RV770 Debut   Radeon HD4850 CrossfireX Scaling

Our beloved Powercolor sent us a pair of these cards, making the quad Xfire tests possible!

IMG 5295 RV770 Debut   Radeon HD4850 CrossfireX Scaling

Asus sent us their 680Mhz core TOP edition card.

IMG 5296 RV770 Debut   Radeon HD4850 CrossfireX Scaling

Last but not least, simplistic design by Sapphire.