Hey! i got a k7s5a, too! just bought the 1700+ from newegg for 43 bucks, and I will be running some cheapo pc2700 ram on it, just for a little extra bus speed wiggle room.
If you look you can find new/modified bios's that will allow you to control voltages(pretty sure), bus speeds, and clock multipliers. look for "honey x" and "cheapoman". Although you probably already know that. Usually you can get these mobos to run stable at 142mhz bus speed at least.
Also a hot tip: The sis735 chipset runs HOT. That crappy little gold heatsink isn't allowed to do it's job due to the fact that it is glued on with that thermal heatsink tape. Feel it as it runs it barrely feels warm. Twist it off, clean it, put some proper grease on it and a couple dabs of superglue at the corners to hold it firm. Now feel the heatsink, it's almost hot to the touch. Better yet take a old 486 heatsink and glue that puppy on. Bet'ya that will make things more stable at high bus speeds!
I'll tell you how my experiments go...
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