Yup, after putting the system together, I was surprised to find that in addition to a single FSP jumper for 100/133 Mhz, the biostar had the follow BIOS settings (soft switch):
DRAM 100/133/Clock-speed
CPU core voltage +/- in very small steps!
CPU speed settings (with variable PCI clk speeds) from 100/33 (FSB/PCI) to ~119/38
(I forget, but I think there may be higher ones..)
Currently, I've just installed the standard software, and ghosted C:. Running Sandra burn-in right now. Tomorrow morning, if everything looks good, I'll up the speed and do some testing.
BTW, the SIS Sandra scores for my Duron@1ghz is quite a bit lower than the 1ghz Athlon in the benchmarks..