open up your manual to page 17. set your #6 dipswitch to [OFF], as indicated, for 2/3 times FSB to give your AGP channel the appropriate frequency (133MHz times 2/3 = 88MHz). turn the page. You have purchased an EB chip. EB chips rely on an FSB of 133, times an internal multiplier (5.5x in your case), to achieve nominal speed (733MHz, inyour case) Therefore, you must set your cpu external frequency to the setting indicated for CPU/DRAM 133.0MHz, and PCI 33.4MHz (#6thru10 [OFF]). Look on the next page for CPU core settings. Look on the next page. Set the CPU core:BUS frequency multiplier to the 5.5 setting (again, 5.5 times 133 = 733). That's 1 thru 3 OFF, and #4 ON.
Now Boot. If this doesn't work, I'd be surprised. But it may not. BX is a 100MHz FSB chipset by design. The fact that it is stable at higher settings is a testiment to the broad tolerances built in to the BX design. But, THE REASON that your EB chip is not appropriately recognized in the 'jumper free' mode as a 733MHz chip is that BX wasn't designed to recognize EB chips. Therefore, it just lands on the default CPU frequency of 550MHz.
The real beauty of the BX chipset is that it can take advantage of the TALLER internal multipliers of the E chips. My 700E, for example, has a 7x internal multiplier. If I feed it 100MHz on the FSB, it goes 700MHz. If I feed it 133MHz, it is forced to run (or fails to run) at 933MHz (7x133=933). It is that simple. I was lucky, in that my 700E chip actually tolerates 140MHz x 7x = 980MHz !!!!! Even more cool is that the AGP channel runs at 93MHz at this setting, so my GeForce is really performing at 40% faster than I paid for !!!!
This is because, as Tom P. has described, the absence of a 'divide by 2' setting in BX for the AGP channel forces us to attempt to use multiply by 2/3X (1X is clearly too fast !). As a result, BX makes 133MHz X 2/3 = 88 MHz. At 140, well, do the math!!! You've got the GeForce, so 88MHz shouldn't be a problem.
One consequence of your choice of the 'EB' chip is that you will have to push your system over '133' FSB to get faster CPU speed. Ya shoulda' got an 'E' chip, because if you couldn't make it to 133MHz, at least you could make it to 120, or 115, forcing your CPU to go faster than its rated speed.
I hope this helps you understand the BX settings as it relates to the E versus EB PIII coppermines.
Good luck.
Clonan, er, the Cyberian