Sorry I don't have a radeon card

I can tell you that your monitor is almost certainly NOT your problem. It is possible that your radeon card won't run at 133 bus but I find that unlikely as well. When you switch the jumper on the Iwill kk266 to the 133 mhz setting, you are reducing the agp speed to the same as it is at 100 mhz fsb. Right now I have 4 theories as to what your problem is. The 1st is lack of power. What size and type of power supply is your case using? When I told you earlier to run your cpu at a very slow speed at 133 bus, that might have proven if the power supply was holding you back. The 2nd is your cpu is not unlocked. Are you sure you can adjust your multiplier. Try adjusting the multiplier while at 100 bus and check with a program like WCPUID to see if your multiplier is actually changing. The 3rd is that your memory cannot handle the 133 bus speed. Try setting your memory timings as slow as possible (cas = 3, 2 way bank interleave, 8/10 ns timings (if using 0307 bios) ) and see if this fixes your problem. The 4th (which is probably unlikely) is that you are having an irq conflict. When running at 100 bus right click on my computer...properties...device manager...highlight "computer"...click on properties button and check which irq your radeon is using as well as what other devices are on the same irq. If you have another major device on with the radeon or if there is 3 or more devices total on it you should move the radeon to an empty or less used IRQ port.
To recap, first make sure the multipliers are in fact changing the way you set them up in the bios. Next try booting at the lowest possible multiplier and 133 bus. Next reduce your memory timings (ahh wait heres a memory test for you

- try running at 100 bus and the memory at pci +33 to see if your memory can handle the 133 setting

)Then if that doesn't shed any light as to the problem get your pc running, check your irq assignments. The only way to fix computers is to troubleshoot. If you don't systematically eliminate things that could be causing your trouble then it is unlikely that you will ever solve the problem. As for removing your nic that was a good idea. It would probably be good to remove all your devices except for the video card and c drive until you solve your problem. Good luck