Im a real newbie overclocker, thats why i had some guy watching over me when i was trying it. BUt anyway, here's my problemoe: when i try overclocking to 1.1 gig from 1 gig, it SEEMS fine, it starts up, temps are alright, restarts and everything (most of the time), but when i try 1.2 gig, things go totally wrong. It starts up the first time, temps are fine, gaming's fine, except when i try restarting again....it doesnt start up at all. After I turn it off and on again, it takes me straight to the bios where it says something about my having incorrect "frequency settings." Just wont work. Ive tried fiddling with the sdram frequency ratio and stuff but nothing. also raised voltage to as high as 1.9 volts. Why does it start up the first time where everything's seemingly fine, but on the restart nothing works? i have a 1 gig celeron and a asus cuv266 mobo 256 ddr 266 ram - sapphire radeon 9000 pro, some aopen sound card, lan card (lynksys) two case fans, didnt bother getting a new cpu fan yet, still running on stock. i wanted to make sure the thing would overclock in the first place before hand. PlEASE HELP, dont want to upgrade for a while.

The problem can be related to the PCI clock speed. At 100Mhz. the PCI clock speed is taken as 1/3 of the FSB speed, so you have 33Mhz. at 1100 you have 36Mhz. at 1200 you have 40Mhz. You see most PCI cards doesn't work at those PCI frecuencies. Try to see if you can adjust your PCI bus frecuency or divider to not go beyond 37Mhz. if you can't, try increment your FSB in 1Mhz. steps to find out the highest CPU frecuency you can reach. BTW: With a FSB of 133Mhz. the divider is 4, you probably won't be able to run the CPU at that FSB, but try just to be sure. Increment the CPU voltage could help, but this should be made with care in steps of 25/50mVolts(0.025/0.050Volts), never go beyond 1.6Volts. Try this as the last resort, probably it won't help you, anyway.

Sorry I thought that you have a Tualatin Celeron but you probably have a Coopermine one. If this is true forget all the CPU voltage comments (if you have a Tualatin Celeron probably you've fried it)

it cant handle that kind of frequency low it down a bit