Overclocking Question

I don't know if what I'm doing is really overclocking my machine... I have gone into Chipset Features and changed our computer from what used to say 350 MHz to 434 MHz, I know it's not much to some of you's out there, but it's as fast as it will run stable on our Windows 98 Pentium II Clone. I've heard the the jumpers must be set in order for the Mainboard to know the CPU has been overclocked... I tried this and it didn't seem to run any faster, I did notice that it seemed to turn off the BIOS. Changing the chipset faster however has made our game operate much better....