TDP and lower guaranteed frequency versus the nominal mode. cTDP up when extra cooling is available, this mode specifies a higher TDP and higher guaranteed frequency versus the nominal mode. For example, some of the mobile Haswell processors support cTDP up, cTDP down, or both modes. As another example, some of the AMD Opteron processors and Kaveri APUs can be configured for lower TDP values. IBM's POWER8 processor implements a similar power capping functionality through its embedded on-chip controller (OCC). Intel's description of scenario design power (SDP): "SDP is an additional thermal reference point meant to represent thermally relevant device usage in real-world environmental scenarios. It balances performance and power requirements across system workloads to represent real-world power usage." Scenario design power (SDP) is not an additional power state of a processor. The SDP only states the average power consumption of a processor using a certain mix of benchmark programs to simulate "real-world" scenarios". For example, Y-series (extreme-low power) mobile Haswell processor show the difference between TDP and SDP. See also Heat generation in integrated circuits List of CPU power dissipation figures Operating temperature Power rating Intel Turbo Boost AMD Turbo Core References External links Details on AMD Bulldozer: Opterons to Feature Configurable TDP, AnandTech, July 15, 2011, by Johan De Gelas and Kristian Vättö Making x86 Run Cool, April 15, 2001, by Paul DeMone Computer engineering Heat transfer