I'm looking to put a new web server together for my friendica, hubzilla, and nextcloud nodes. Currently it's on an i7-6850K based machine clocked at 4.2 Ghz, 6 cores, 12 threads, 128GB RAM.

I am planning on an i9-10940x based system, 14 cores, 28 threads, 256GB (the increased memory is needed most but more CPU won't hurt either) and reportedly over-clockable to 5Ghz IF I can find adequate cooling and there in lies the rub.

Looking for recommendations for a AIO liquid cooler that can dissipate 500 watts and keep the block at or below 84C, that can last more than six months. I've found a unit that can dissipate this much heat but the reviews says it is prone to corrosion and garbage after six months. I want something that will give years of uninterrupted service, server class.

Also looking for an inexpensive GPU non-Asus that works well with Linux, does not need to be fast, won't be doing gaming, this is just to provide a head on the server when I'm on site. Won't be playing video games so don't need 300 fps or 3D graphics of any speed.