If my processor is marketed as 1200 MIPS but can run at 2000 MIPS for up to 0.5 seconds out of every 15 second window (due to thermal constraints), but only up to 1700 MIPS when executing SIMD instructions for 0.5 seconds and 1000 MIPS thereafter, and only up to 900 MIPS when it gets too hot because my laptop is sitting on a blanket instead of a hard surface, what is the correct denominator?