Overclock and Overvolt

You know how when you buy a computer, and it says like intel atom (i have to use this shitty CPU so that it still relates) 1.66GHZ? that's the clock speed, the 1.66gHz part.

so what does overclocking do?
Well for starters, some games only work on ARM v7 speeds (800MHZ and above) like temple run. So if you're using an ARM v6 phone, there's a few things you can do. You can suck it up and find a shittier version of temple run to play, you can decide not to play anything and use your phone for calling your girlfriend only, you can be a rich spoilt brat and decide to go crying to your mum to buy a new and better phone, or you can overclock your phone to play temple run.

note though, overclocking burns more battery.
So overclocking is basically making the processor run at a higher than normal speed. So with an ARM v6 device you can now overclock it to ARM v7 speeds.
There are 3 problems with this though
a) it overheats, a fucking lot. Study your physics and you should know it will overheat.
b) it sucks a lot of battery. The battery level will drop a lot (and by a lot i mean it can go from 100 to 0 in like about 2 hours, that's what happened with a 40 percent overclock on my X8 to play contract killer)
c) it sometimes requires TOO much battery power

that's where overvolting comes in

Overvolting is making the battery output more than the manufacturer stated amount. The reason why this is physically possible is because industrial standards usually means that a 3.75 v battery should be able to output 4.5v. You do overvolting because you can, you want to, and your processor needs it.

Overvolting burns even more battery btw, so you really have to be careful not to really go crazy on your battery.

The trick to making it stable is to slowly raise the clock speed until it becomes unstable (your phone will auto reboot), then pushing the voltage up a little, then increasing clock speed again, then voltage, etc.

There usually will be a point where your battery cannot output anymore and forcing it past that line will result in either a) auto-reboot, or b) if you still continuously force it there, the ions in the battery will expand so much it'll explode and you'll spend the next 6 months in hospital for third-degree burns (i'm serious, some guy in china did that and it went boom on him, the acid corroded his skin)

Yep that's about it, if you want more info just head over to the guys at xda. until then, keep on hacking (playing with code :D)