I'm currently having the exact same problem with my Athlon 1.4 266FSB and new FIC AD-11 (he only mobo in the city that was listed on AMD recommended mobo page)... The BIOS is set to automatic or default, and the mobo jumper is set to 133... when I first switched it to 133, I couldn't insstall or run windows... then I sent it to be tested, got it back with a new mobo and win98 installed... worked fine at 100 (1050), and then I decided to test the jumper again... worked at 1400... booted up, I kept installing and updating things, one piece at a time... then after working fine for a few hours, it wouldn't boot in 133FSB (Window Protection Error. You need to restart your computer.)... so I switched it back... worked at 1050... then the next time I rebooted, it reported CPU speed of 850... Well, I'm glad to be running at 850, but I paid for 1400, and would rather run at 1400... Ssoooo... I loaded Win2k on, and that's fine, then switched the jumper on the mobo back to 133.. ran at 1133(where it's running now)..decided to try to overclock it using mobo software... at 150FSB, I run at 1275... :\ I don't understand it... The people who looked at it got mad when I told them I hopped it up to the 133, and I'm like "This is my coputer, and I would like to run it at normal clock speed." I'm super fed up... having gone through 3 mobos on this purchase and 4 WEEKS, without a 100% operating computer, it's become a real tick-off....
Is there any advice ppl may have for me? Or at least tell my my CPU is semi-fried or something. :\
<font color=orange>Everything I install is based on Plug n' Pray architecture</font color=orange>