ap.o.gee: The farthest or highest point; the apex; a final climactic stage The ApogeeTM HD is Swiftech"s new flagship CPU waterblock. Close to 18 months in the making, it was designed to surpass its predecessor the ApogeeTM XT in all critical areas: Improved thermal performance with emphasis on Intel® and AMD® latest and upcoming processors: the HD is Socket LGA2011 (Intel®) and "Bulldozer" (AMD®) ready. Reduced flow restriction compared to the Apogee XT Rev2. Innovative features, with the introduction of the multi-port connectivity: two more outlet ports have been added for dramatic flow rate improvements in multiple waterblock configurations and when used with the new MCRx20 Drive Rev3 radiators that now also include two additional inlet ports (3 total); read more about "Flow Parallelization" in the section below including examples and in-depth explanations. Improved thermal performance out of the box with the inclusion of high performance PK1 thermal compound Swiftech"s retention mechanism is widely recognized as the simplest and safest to use. It has been further enhanced with added attention to details and quality, such as hollowed thumb screws, and improved back-plate fabrication. Adjustable screws provide compatibility with all Intel Desktop Processors: Socket 1155, 1156, and 1366 (back-plate included) Socket 775 (not included, mailed free of charge upon request) A socket 2011 spring-screw kit will be available shortly. An elegant Multi-mount hold-down plate provides compatibility with all AMD Desktop processors: sockets 754, 939, 940, AM2, AM3, 770, F, FM1, as well as legacy Intel Server socket 771 processors. The kit is not included with the Apogee HD, but supplied for free (shipping not included), upon request.