The only downsides are: It’s a dust magnet since it’s an open case and you’ll spend more time staring at the CPU rather than the monitor. (PS: It’s an unfinished setup cuz I can’t get my hands on a Founder’s Edition 3000 series GPU from NVIDIA since it’s always out of stock.)
This CPU is fast, really fast. Remove the power limits and let it’s boost algorithms take over and it will blow your socks off. You will need a good AIO or really beefy air cooler (or obviously a custom loop).