We used latest MSI AfterBurner and GPUz along with Furmark 1.9.1 and our benchmarking suite to test the overclockability and stability at the highest possible clock. Fan and voltage settings are left on default during overclocking.
Please note that every card overclocks to a different level, our testing should only be considered as a guideline to what you should expect from your card.
We were able to overclock the core clock to 960 MHz from 900 MHz default (7% overclock) and memory clock to 1050 MHz from default 1026 MHz (2% overclock).
We ran Unigine Heaven 2.5 at 1080p to check the actual performance gain.
Gain in performance is roughly 6%.