Per your information, changing the memory frequency to 200MHz will solve my memory problem (or at least whatever problem I thought I had).
no, i would strongly advise you to set your memory "by SPD" serial presence detect instead of manually setting to 200Mhz. information displayed at bootup (called your computer POST power on self test) should display your memory correctly as pc3200 at 400Mhz.
Now on the topic of determining my multiplier. I take the clock speed of my CPU (2GHz) and divide it by the intended FSB (266MHz), correct? That gives me a multiplier of 7.5, which should be the factory locked multiplier for my particular CPU. Is this correct? If not please tell me what I'm doing wrong.
no that is not correct. multiplier equals CPU clock speed divided by CPU enternal frequency.
multiplier = clock speed / CPU external frequency
remember what i said about your frequency is doubled by the memory? so take half of that FSB.
example you have xp2400 CPU with 266Mhz front side bus. your CPU external frequency is 133.33333.....Mhz and your CPU clock speed is 2000Mhz. take clock speed (2000Mhz) and divide by CPU external frequncy ( 133.3333....) you end up with multiplier is 15.
for CPU with 333Mhz FSB front side bus your CPU external frequency is 166.66666....
don't worry about asking many questions. it is better to open your mouth and feel foolish for a few minutes than to not ask any questions and be a fool forever. . . .that and plus some of us have nothing else better to do