So what we’re seeing here is the system bus speed difference between the TiBook and the 17” makes for near zero actual processing performance improvement.. or do you think the benchmark software’s CPU/FPU testing process is being cached on the L2 (or L3) in both cases not needing to refer back to the system bus? I wonder what Geekbench 2 in Tiger would have to say about it. I find my TiBook 867 runs pretty hot compared to the 15” and 17” AlBooks. My 17” in particular (1.67Ghz SLSD), never seems to even warm up, let alone run the fans. It must have a very efficient thermal design.