The Cooljag DAL-D 1U Server CPU Cooler is designed for Socket 771 Xeon Dempsey / Woodcrest processors. Using a 75mm blower on top of a pure copper heatsink, this cooler fits in 1U servers. CoolJag CPU coolers feature skived technology which utilizes a heatsink base and fins milled from a single piece of material. This process allows for greater cooling advantages over traditional soldered fin connections.