HD7990 Quadfire tested: crash happy
 

The enthusiast audience waited throughout 2012 for AMD to come up with a dual GPU HD7970 solution. In the end they failed to deliver, so it fell onto partners to create a solution. Powercolor, VTX3D and Club3d all released the HD7990 last year – a monster dual GPU designed to battle head to head with the Nvidia GTX690.

http://www.kitguru.net/components/gr...d-crash-happy/