In the past, CPU TDP was a measure of the maximum required cooling performance of a cooler to maintain the normal operating temperature of the CPU. With the advent of performance "boosting" technologies, the specified TDP is no longer an accurate representation of the required cooling performance, but more a baseline reference. When these technologies are enabled, CPUs can boost well above the specified TDP rating and they try to take advantage of thermal overheads. It is therefore important when choosing a CPU for a fanless case to consider the actual maximum TDP that the CPU can output. Wherever possible, aim for a CPU TDP that is below the case TDP rating or consider BIOS settings that will limit the CPU to the maximum TDP supported by the case.