From my understanding, the clock speeds specified in GPU specifications do not always represent the maximum clock speeds the GPU can achieve. However, what perplexes me is why MSI Afterburner consistently reports varying clock speeds for the same GPU across different Windows installations.Your gpu cann Boost: Up to 2602 MHz / Game: Up to 2413 MHz but could be that MSI reading abit wrong or correct and maybe its little tiny tiny bit extra boost. Do not think there anything to worry about not unless you have really really high temps and computer overheating