To overclock today we are using the latest version of Sapphire's TriXX software.
The Sapphire R9 290 Vapor-X OC responds well to overclocking, hitting an additional 17% manual increase with some voltage changes. This took the core speed from 1,030 mhz to 1,205 mhz. The Sapphire R9 280X Vapor-X OC was able to run stable with a 9% overclock to 1,198mhz.
This manual increase pushed the Sapphire R9 290 Vapor-X OC to a final score of 17,418 points. In real world terms this pushes it ahead of the overclocked Gigabyte GTX780 Ti Windforce OC!