Actually I've benched this Celeron 1.4 GHz machine at 1736 MHz (1.7 V). FSB 124 MHz, PCI at 31 MHz. It's not very stable but I did manage to get a Sandra and QIII bench out of it. With QIII, it was about 8% faster with my settings but they were set too high for CPU testing, at 1280x1024 and everything turned up to max. But that's how I'd play so that's what I tested.
104 fps --> 112 fps
My system then crashed and so I just gave up and put everything back to normal. I won't bother attempting 112 MHz. The 37.5 MHz PCI is a little too fast for my tastes.