For our manual overclocking tests, we used MSI Afterburner. Our best results are as below.
Interestingly, MSI has locked the power limit at 100%, so it cannot be raised above 285W. Still, we were able to add 190MHz to the GPU core and 1600MHz to the memory.
This brought average clock speed up to just below 2930MHz in the real world.
This overclock netted us 5-7% extra performance in the three games we re-tested. It's fine, but no great shakes.
Power draw barely changed with this overclock too, coming in just 1W higher than what we saw at stock.