Before I answer the overclock question it is important to know what your CPU is, because it could be a bottleneck for your GPU hence answering the question of what is holding back your GPU. To answer the overclocking question, the first step would be increase the power limit to its maximum, and then next gradually increasing the core clock over time by around 25MHz. Play some games to make sure the new core clock is stable. Eventually, your game will crash and that will be your signal to back off the core clock by the amount you added before it crashed. You can make bigger jumps in the beginning of around 50MHz if you like. Repeat the same process with the memory clock but start with 50MHz jumps instead of 25MHz since the memory generally has a much higher clock speed to begin with. With these newer cards I have found that increasing the voltage doesn't really do much in helping with the overclock so for now I wouldn't even touch the voltage. I would probably recommend you reset your voltage to stock before starting. Generally though, at lower resolutions like 1080p and 1440p, you won't benefit much from the overclock since your GPU is generally waiting on your CPU. Although at 1440p it might make a difference since your GPU usage will surely increase. In the end, every card is different, so you may not be able to overclock much, and the benefits in doing so may be small. In some instances, it may not even be worth the extra power draw and you can gain more just by undervolting and getting a cooler and (potentially) longer lasting card. For example, is a 2-3% increase in FPS worth the extra 50-100 watts of more power draw, significant temp increases, and thus higher dB of noise? Would your answer change if it was a 5-10% increase given the same drawbacks?