IgorsLAB checked out the Alphacool Core Ocean T38 CPU AiO Compact Water Cooling
A quote from the article:
In the AiO water cooling category, Alphacool recently took first place in terms of cooling performance with its Aurora HPE series, partly thanks to the more expensive copper radiator. However, the Core series does not have this advantage, because a radiator made of the cheaper aluminum is used here again.Alphacool Core Ocean T38 CPU AiO Compact Water Cooling Review