Back in December 2011 AMD launched their new 7900 series of graphics cards, initially debuting the 7970 and soon after the 7950. Since then we have seen various models released which fill gaps in the market at lower price points as well as a refresh of the 7970, the GHz Edition which enabled new Boost technology for enhanced performance.

Something always stuck out from that original 7970 launch back in December though, a slide mentioning dual GPU product. There was no concrete info but it would have been fair to assume AMD would deliver their X2/7990 product in February/March time... they didnt and then summer arrived along with the GTX 690 allowing NVIDIA to release the fastest "single" card around.

Recently AMDs partners were given the ability to design and release their own 7990 products (or 7970 X2 if you like). This would see two 7900 series GPUs on one PCB and every design would be different, PCB layouts, power spec, outputs, coolers... the works. One of the first to market with a 7990 is PowerColor with their Devil 13 card. This is as extreme as Radeons currently get and today we put it head to head with the GTX 690 to find out which is best in the latest games including Max Payne 3 and Battlefield 3 at resolutions up to 5760x1080... all with our Core i7 CPU running at 5GHz.