Trotter said:You can't overclock an eMachine. Or a Dell, or an HP, or a Gateway, etc.
Prebuilts have locked BIOS that prevents it.
Clockgen is a program that overclocks. It will work, but ONLY if your motherboard is supported by it. If not, you can't. My friend's eMachine motherboard is supported by it, my eMachine's was not.
If it is, go for it...if not...you can't.
Also, resetting CMOS won't do squat if he overclocks with a program and screws it up. The only way to un-do it is with the program.