I have had a number of disappointing experiences with all in one water coolers over the years, but I have decided to give the CoolerMaster Nepton 120XL a go for my AMD 4350 server. There is a review here.
The Nepton 120XL looks like a nicely engineered unit unlike the Corsair H60i it replaces which neither felt quality nor delivered a quality end result. I’ll report back on temperature figures in due course, but I am hopeful of an improvement over the stop-gap Artic Freezer Pro 13 I have in the case currently. I’m also adding a couple of quiet Corsair 120mm fans to assist airflow should it be required. To be fair to the Arctic Cooling Freezer Pro 13 it does a perfectly fine job of cooling – but it can get pretty loud under load and isn’t exactly quiet at idle.
I am not planning to overclock the box significantly but I’d like the extra cooling headroom to do so and water cooling is generally quieter in my experience provided the pump isn’t noisy (I’m looking at you H60i!). I’ve not yet decided on whether I should invest in a dedicated fan controller like the NZXT Sentry 3. I doubt I would use it to be honest, but it is an option. I like the look – it would go well in the Corsair SPEC-03 Blue LED case.