I recently upgraded my i3 8100 to an i7 9700k because they went on sale for $200 at Microcenter. I'm still using the same Aorus B360 Gaming 3 Wifi motherboard I used with the 8100. I already have a Cooler Master ML240 AIO. As of now, the 9700k is turbo-ing to around 4200MHz consistently. The VRM on the motherboard is definitely bottlenecking the CPU, considering the CPU temps stay around 50C under load. If I were to upgrade to a Z series mobo I would aim for a 5GHz OC. Are the performance gains from buying a ~$160 Z390 board worth it, or is it more worthwhile to just keep my old mobo? I would hate to feel like I'm leaving a significant amount of performance on the table. My other components are a RTX 3060ti, 16GB DDR4 2666 and a 650 watt PSU. Thanks for the help.