There's a limit to how hard you can hit the boy. At a certain point, you just bludgeon him to death and get no more marbles. When you knock him unconscious, just back off a bit on how often you beat him. You'll find a pace that keeps him alive but faster than he'd be without the constant whipping.
That's known as tuning your overclock.
Every slave lad is different, too. Just because your friend can beat his silly with a baseball bat doesn't mean yours will survive such abuse.
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To put numbers to it, your phone runs at 550 Mhz. Almost all Droid processors function quite well at that frequency, so Motorola doesn't have to worry about returns. However, most Droid processors can run at higher frequencies than that. No one bothers to test them and sort them (yet).
Many people seem to have no problem running their Droids at 800 Mhz (which is significantly quicker than 550 Mhz). Some have been able to push it further: 1000, 1100, 1300 Mhz. I don't think anyone is modifying the potential, or voltages, of their CPUs so it's just a frequency tolerance (you can increase a CPU's frequency tolerance by increasing its potential, but this also creates more heat which is also a limiting factor - we do this as a matter of course with computers).
All this reminds me of one of my electrical engineers. He thinks I'm a bit...adventurous...when I overclock my computer and burn custom ROMs on my graphics cards all in the name of getting the most out of my iron. Overclocking a phone is just crazy talk to him.
We do what we must because we can.
- GLADOS