To really run a CPU hot, you need to manually create a workload that utilizes all of the computation units (ALU, FPU, SIMD) interleaving assembler commands. Thi

To really run a CPU hot, you need to manually create a workload that utilizes all of the computation units (ALU, FPU, SIMD) interleaving assembler commands. This is nontrivial, and will not happen "by accident" when doing aggressive optimization. Have a look at the cpuburn program for one example.