No need, the magic are a few things that's on their website. have no idea how much each influences the performance but they claim that their drives use microsteping, midband resonance damping and "morphing" to get better performance out of the motors and what can I say? It works.
You can ask anyone on this website that has used more basic drivers that resonance can be a serious problem with stepper stalling at mid to low RPM. Adding dampers to the shaft of the motors can fix it and apparently there's DSP tricks one can do to get rid of it too.
You may have heard people say before that "according to physics, bumble bees can't fly"? Well, that's absolutely not true. According to physics bumble bees absolutely can fly it's just that elementary physical models don't accurately reflect what's going on to get the damn thing to fly. When the model gets more sophisticated, it more accurately shows how the bee is flying.
Seeing as my machine runs at 400ipm on the big axis, and I regularly cut at 400ipm, I'm going to say "my bumble bee flies". If the calculator on that site doesn't match my performance it's down to a couple things - either we're entering the parameters incorrectly or the calculator is just plain wrong. I guess to be more kind one could say as I mentioned before, that the calculator is conservative rather than just plain wrong.
Gecko Drives may not be the best stuff out there but there's a reason they have a good reputation and are recommended on this site. While it's not the solution for every machine, the G540 gives you great performance bang for your buck when it fits the bill.