For manual overclocking, our best result came with the power and temperature limit sliders set at their maximum values. We were able to add 60MHz to the GPU core and 900MHz to the GDDR6X memory.
This resulted in performance gains of 6-7% in the titles we re-tested at 4K: F1 2020, Gears 5 and Watch Dogs: Legion.
Power draw, meanwhile, increased from 417W to 467W, a 12% boost.