There's usually more than one way to raise the bus frequency. When you do it in small steps, many older chipsets will maintain a certain FSB/PCI divider as you go upward, overclocking your PCI devices (including the on-chipset IDE controller).
So you'll want to jump directly to 133MHz, so that the FSB/PCI divider is switched from 100/33 (PCI at 1/3 FSB) to 133/33 (PCI at 1/4 FSB).
Your motherboard offers a couple ways to do that. The old fashioned way is to use the switches on your board, S5, 6, 7, 8, 9, at On, Off, Off, Off, On. To use the switches you have to change the JEN jumper (next to the battery) from 2-3 to 1-2.
You might also want to change the OVER_VOLT jumper (near the upper left hand corner) from 1-2 to 2-3 to allow better voltage range in BIOS. And while you're at it, you might even want to change the DDV_OV jumper (near the upper right corner of the DIMM slots) from 1-2 to 2-3.
Before messing with jumpers I suggest you at least try the CPU bus straight up to 133MHz (due to the PCI divider issue) with the vCore at 1.65v. Gradually probably won't work due to the PCI divider issue.
If you can't boot using those settings, you always have the CLR_CMOS jumper (to the right of the chipset southbridge) which allows you to reset BIOS to default values!
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