|That particular P3 is a Slot 1 cpu. You probably won't be able to overclock it because it's a Gateway system. |
Go into the BIOS and look for Bus Frequency, FSB Frequency, System/PCI Frequency or similar. If it's adjustable, try increasing it to 112MHz first.
The 440BX chipset was only officially rated for 100MHz bus operation, but many BX boards could run reliably at 133MHz, so long as the graphics card could handle an 89MHz AGP bus (nearly all nVidia cards could). At 133MHz, the BX will automatically clock the PCI bus at 33MHz, so you won't have to worry about your audio, network, and HDD controllers.
EDIT: Dang, a minute late! :)
DOS/9x Gaming Rig | Athlon 600 @ 672MHz w/ Golden Orb HSF | 384MB | 60GB
Voodoo2 SLI + GeForce 256 DDR | SB Live | Asus K7V | 21" NEC CRT | Win98SE