That's a nice start, but it's not really fast until you have:
* Destroyed your case by making a frigging hole (a.k.a. "window") in it's side. Some people buy cases that are made useless this way at the factory, but that's cheating and you'll be dissed by the 1337, and it will cost you 100 kkeys/s in dnetc.
* Installed some sort of lighting inside your case. Nothing makes electrons flow faster along the buses than a continuous supply of UV light, but plain visible light can work too.
* Installed extra fans. Lots of fans. But only with LEDs built-in. Preferrably installed so that their flow works against eachother, but the main point is that they're visible.
* Switched the boring, functional fan grilles for something more useless and expensive. "Spiderweb" fan grilles: +50 kkeys/s. "Biohazard" fan grilles: +100 kkeys/s.
But you really ought to get a PC. It's much easier to compare case modding results in 3DMarks, and your Amiga won't take the extra-fast graphics cards that have monsters printed on their cooling assemblies.