The AMD Phenom X4 9150e continues AMD's efficient line of processors, reserving itself at a merely decent 1.8GHz in order to maintain a 65W thermal envelope (TDP). In comparison to other quad and even triple core processors which operate with a TDP of 95W, the 9150e falls within the range of heat and energy expenditure of most dual core CPUs. Thus, while the 9150e is no powerhouse, it allows for cool and quiet operation while maintaining full use the latest quad core AMD technology.