Review: Sapphire Radeon R9 290X Vapor-X 8GB

Overclocking

With no extra voltage applied, we boosted the core clock from 1,030MHz to 1,099MHz. Memory increased to an effective 5,860MHz.

The uplift in frequencies enables the 8GB card to jump over a couple of GeForce models and run at the levels seen on the stock GTX 980.