I'll probably spark a debate here but the best way to maximize performance via RAM, especially with an i9 processor is to go with 3200MHz and tighten the timings down. Economically it makes the most sense by opting for 3200MHz over 3600MHz, and after you tune the timings, the difference isn't that wide and in some situations nearly equal to 3600Mhz. You'll see the largest performance gains up to 3200Mhz and then it trails off to the point where it becomes a question of spend more for less gain. With an I9 processor you will absolutely notice a difference, at least benchmarking-wise, that the extra bandwidth provides and even more so if you have a hopped up GPU. Lastly, when it comes to over-clocking 3200Mhz is definately the sweet spot; any higher speed is paid for at a premium. All around, including if you chart out price compared to gains I totally recommend 3200Mhz over 3000, definately (but after 3200Mhz the percentage of price vs improvments starts to climb higher). If you plan on overclocking you may regret going anywhere under 3200Mhz.