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I've got an old desktop PC with an i7-4770K CPU @ 3.50GHz (i don't bother overclocking it these days). And my work laptop which is a 12 month old lenovo something or other, with an i7 CPU (can't remember which one off the top of my head). I've noticed that when it comes to CPU intensive tasks, e.g. some simple image analysis or statistical analysis, my old desktop PC is usually faster than the laptop. On both systems the same process maxes out the CPU (and does not use the GPU), but the old one is usually faster or at least no slower. Why is my >10 yr old CPU be beating a 1 year old CPU of the same class? Or to put it another way, why is the laptop so crap when it comes to CPU intensive tasks?