the processor. The bus speed, the chip set, dedicated versus integrated Graphics and memory all effect the actually speed of the system.
I'm in the market for a laptop (I've got my eye on a sony Vaio 140e/b)
and I've been looking at processor speeds (along with RAM, FSB, and others).
However, I'm not sure exactly how much processor speed can tell me about how fast the computer will be in reality. For example, an Intel Core Duo T2450 runs at 2 GHz, but I'm led to believe that a Core 2 Duo at 1.8 GHz would actually run faster.
Just for comparison, the Core Duo is in a compaq presario v6444us, and the Core 2 Duo is in the aforementioned VAIO.
What I'm wondering is basically: what way, if any, is there to determine the actual speed of a computer? Can processor frequency be my main determiner of speed, or is there something else that I should look at?