check your motherboard manual, it must supports changing the FSB either through BIOS or a set of jumpers or DIP switches on the motherboard.
you cannot change the multiplier without unlocking the CPU, so all you can do is to change the FSB. 140 Mhz is pretty conservative setting for overclocking the XP1700+, just check your mobo manual how to go about it.
The Epox site says you can increase the FSB upto 200 MHz from BIOS. Check the manual. If possible, update the BIOS with the latest version.
girish
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