I tried the same settings as your's, other than what you have on your's marked R25 and it booted and worked normally, but everything reported it as 0mhz. I tried changing R25 and it KP'd at start. Right now I am going back to stock. I'll post more as I find out.
I am thinking it just may not be possible on this chip. I am starting to think the Xirlink chip has some sort of logic that handles it all, beings the chip is auto switching from 100 to 133mhz FSB. The only other explanation I can think of so far is there are two blocks, one for each bus speed. I am comparing to the MDD which has the same 7455 CPU and _nothing_ matches the configurations on this board even remotely.
Well I believe I found one why my unit KP'd with what I thought was all jumpers the same as the 1400mhz module. The row of 6 larger resistors under the SC1182BCSW chip appear to be voltage related. They are the only ones I did not change. I have one less jumped. I do not have that proper resistor and I am not sure I want to chance just bridging it. I also can not find much data on that chip. Still none of the blocks of jumpers match up to anything like the charts I am finding. Did Sonnet purposely mix them up? I have no idea.
Well that sucks that your cpu burned out. Sonnet is bad for not making it so you can't change the multiplier and experiment with different cpu speeds. All the other companies out there make it so you can toy with the cpu. Fastmac, OWC, Gigadesigns (now a dead company), Powerlogix, and even NewerTech. Sonnet was the only one to go against that rule.