Hi. I am new to this. I want to over clock my computer. I have an asus CLU or something like that motherboard and the bios lets you overclock easly by selecting to mhz speed. I am just wondering what would be the best over clock speed I should go, with the stock cpu fan and stuff. I got a pentium 3 933mhz

Does your motherboard have any kind of heat sensors? Can you see the temperature of your CPU in the BIOS?

Depends on your memory. Good PC133 could go up to 150+. My last venture with the 850 went up to 1.13 Ghz using Abit. You CPU is 133 FSB, I believe you could select 100Mhz memory speed in your BIOS. I did not experience any temp problem at that speed with both intake and exhaust case fans.

I can only suggest to use a software the checks your system temperatures. A good one is motherboard monitor 5.xx. It's free and should be easy to find. If you run your system with higher speed you get higher temperatures and I'm sure you want to keep your cpu and other parts a while longer. The question about the optimal fsb frequency is not that easy to answer because it depends very much on your components. And it's only the fsb you can work with as the PIII has a hardwired internal multiplicator (in your case it's 933/133 = 7 -> every MHz fsb changes the cpu speed at 7 MHz!) that can not be changed. It's not only the ram you have to look at but also all cards you have on your board. As soon as you rise the fsb tact of your board the tact of your agp and pci slots (isa also if you still have) will also rise. As an example, in your case the fsb of 133 MHz will be devided with 4 to get the normal 33 MHz pci tact. If you change the fsb to 150 MHz as mentioned above the pci card will run with 37,5 Mhz. That doesn't sound that bad but one or two of your pci cards may think otherwise and stop working. Normally that won't kill them but your coumputer won't work until you lower the fsb again. You have to find the optimal speed for yourself for your system. I suggest you start by rising the fsb with 5 Mhz and test if it still runs stable. Run a few benchmark programs like madonions 3D Mark 2000 or 2001 on it to see if it still works (also help you to see what the overclocking really brings in additional speed). Also keep an eye on the cpu and mainboard temperature. If the system doesn't crash try the next step but the higher you go the small you should make the steps in MHz! Compare the benchmark results in every step as not every setting has to bring better results! A good example for bad overclock speeds is my old Asus P2B board. I upgraded it with a celeron 733 MHz and overclocked the FSB from 66 to 112 MHz which gives me 1232 MHz cpu speed as long as I keep the cpu temperature at 40°C or lower (yes I know I was very lucky with that cpu :) ). That old board had only a couple of jumper positions so I had to take the given settings for testing. The strange thing is that the high settings of 100, 103 and 112 MHz FSB all bring increasing point values with 3D Mark but the 75 MHz setting is more than 10% slower than the original 66 MHz setting! I hope that helps and be careful because overclocking can damage your hardware!!!