Raptor's right: if you want games performance, get a desktop.
Laptops, funnily enough, were designed to be portable and as such, manufacturers try to make things as light as possible. This usually means that pretty much everything was soldered directly on to the motherboard. They never thought that it was a problem because hey, the only folk buying laptops were businessmen using MS Office and very little else.
They also tend to have very underpowered parts in order to try and conserve a little bit of battery life. If you are really wanting to get a little extra speed, you could try a bit of overclocking. This invloves increasing the voltage in the CPU *SLIGHTLY* in order to get a few extra Hz out of it.
Of course, higher voltage, more battery drainage and so more time spent with the thing plugged into a mains socket. Which, in my mind, kinda defeats the point of having a laptop in the first place...
