Technical Product Specification

Functional Architecture Intel® Server Board S5520UR and S5520URT TPS

Intel order number E44031-012 Revision 1.9

3.1.5 Unified Retention System Support

The server board complies with Intel

’s Unified Retention System (URS) and the Unified

Backplate Assembly. The server board ships with a made-up assembly of Independent Loading

Mechanism (ILM) and Unified Backplate at each processor socket.

The URS retention transfers load to the server board via the unified backplate assembly. The

URS spring, captive in the heatsink, provides the necessary compressive load for the thermal

interface material. All components of the URS heatsink solution are captive to the heatsink and

only require a Philips* screwdriver to attach to the unified backplate assembly. See the

following figure for the stacking order of the URS components.

The ILM and unified backplate are removable, allowing for the use of non-Intel

heatsink

retention solutions.

Figure 11. Unified Retention System and Unified Backplate Assembly