We used MSI Afterburner to overclock the Lightning Z. Our best result came with an extra 95MHz on the GPU core, while we were able to add 950MHz to the GDDR6 memory.
3DMark and games testing
This brought us some decent gains – an extra 5% in Fire Strike, for instance, and then another 5.3FPS when playing Shadow of the Tomb Raider at 4K.
Average clock speed under load
This extra performance is due to the overclock running the GPU at an average speed of exactly 2GHz. It initially hit 2055MHz, but couldn't maintain that frequency – and thus averaged 2000MHz for the duration of our stress test. Considering how heavily factory overclocked the card was out of the box, I'd say this is a very good result.