With its new hybrid cooling design for the XT, Zalman has lost the traditional silence of the previous Reserator systems, but gained significant cooling performance. The Reserator XT is indeed a worthy successor to the Reserators of the past and boasts easy installation, attractive styling and superb materials and workmanship. Digital monitoring of fluid temperature and fan/pump speed control are welcome features, and the mechanical flow indicator adds a visual confirmation of coolant flow rates as well.