Best liquid Cooler for Dell Precision 5820

https://www.techpowerup.com/304810/alphacool-introduces-water-blocks-for-intel-lga-4677-and-amd-sp5-sockets?amp

there is no commercial AIO for LGA4677 socket as this is a server platform not consumer (low demand small market not much incentive for research development) but a custom liquid cooler is possible.

If you are looking for a better cooling solution than the stock cooler, this might be a solution for you: ‎How to Fix Overheating and Limit Throttling Issues on DELL Precision 5820 and the Solution of Adding Rear Fans | DELL Technologies

A few people experienced fan error warnings after upgrading to the Noctua cooler when starting their computers, and they had to go into the BIOS to turn off RMT (Reliable Memory Technology). This might be because the stock fan has a higher speed than the Noctua fan, causing this issue. However, I did not encounter this problem.

I also looked into whether there was a way to upgrade to a water cooler. I found a few coolers that fit the LGA2066 socket; however, they seem difficult to mount on Dell motherboards even though they use the same LGA2066 socket. The Noctua NH-U9DX i4 is very easy to replace the stock cooler of the Dell 5820.

LGA4677