I made the mistake of putting the 3900X in the CS381, which, sadly has zero cooler clearance, and so the NH-L9a I had to use so it'd fit, has horrid cooling per

I made the mistake of putting the 3900X in the CS381, which, sadly has zero cooler clearance, and so the NH-L9a I had to use so it'd fit, has horrid cooling performance. I'd just suggest being careful with case choice to make sure you can put a big cooler or an AIO on the CPU.