The Asus P5N-D motherboard combines performance and energy efficiency. Using Intel Core 2 quad/core, it is compatible with Intel 05B/05A/06 processors. Support is also available for the Intel 45nm CPU. The Asus energy processing unit, ASUS A1 Nap and Asus EPU technology work together to provide increased energy efficiency without affecting performance. The Asus EZ D24 options include quick connector, Q-Shield card and the Asus crash free BIOS2. Also included is the ASUS Precision Tweaker 2, ASUS Q-Sheild and support for the PCle 2.0 dual and 16 SLI.