I currently own a Ryzen 5800x that is cooled by a Noctua U12A. My case is a Meshify C that I replaced the stock fans with Cooler Master Silent 120mm fans and added one more 120mm intake fan, so not I have 2 120mm intake fans in the front and 1 rear 120mm exhaust fan and my CPU now runs a little cooler, at a fixed all-core 4.6GHz at 1.25V my 5800x is now hitting 80C in Cinebench R20, whereas before I replaced the stock fans + added one more intake it was hitting 85C at the same CPU settings. Also at CPU stock settings, I seem to be getting slightly better boosts as my Cinebench multicore score slightly improved, but it's still within the margin or error range, since it's like a 1% improvement, but most of the time that 1% improvement is consistent each time I"m running Cinebench R20. However, I'm still not satisfied with my CPU temperatures at stock settings as it hits 90C within 25 seconds of running Cinebench R20 multicore whereas before the case fan replacement + additional intake fan it was hitting 90C within 10 seconds. I'm looking for even better improved CPU cooling and I was thinking about replacing the 2 Cooler Master 120mm intake fans with 2 Arctic 140mm PWM fans and replacing the rear Cooler Master 120mm exhaust fan with an Arctic 120mm PWM fan. I was also consider just replacing my case with one that has vents in the front or front-sides. I also considered replacing my Noctua U12A with a Cooler Master 240mm AIO (don't want an AIO that needs software installed to run) and top mounting it but I read reviews that showed that the Noctua U12A has about the same cooling performance of some 240mm AIO's and the only way I can install a 280mm or larger AIO is if I install it in the front but I heard that doing it this way causes more heat to come into the case that top mounting it as exhaust because of the radiatior emitting hot air into the case if it's mounted in the front as intake. Am I better off with a top mounted 240mm AIO as exhaust than a front mounted 280mm AIO as intake? So what is best for improving CPU cooling to what I have now?