According to my BIOS ID its a Biostar MB. I can not find any switches or jumpers for CPU speed. 1. Is there an easy way to ID the board model or do I have to pull everything apart and find the it on the back side? 2 Would somone please explain overclocking basics? I understand the CPU frequency but when its getting into clock speeds and divisions I have a brain fart. For instance once I can update the BIOS what do I do next? 3. Ive seen comments that this CPU can be run at 266 and even over 300MHz. Whats the actual limitations determined by?

it can goto 266 easily check near the processor for jumpers otherwise they are in your bios

1. The model number is usually printed somewhere on the face of the board. Sometimes they are hard to find...& sometimes they stare ya right in the face & you still don't see them...lol! Carefully scan your board...your model number will begin with M5xxx. After you find it, have a look here for your jumper settings: http://www.biostar.com.tw/support/jumper/archives.php3 If you can't find the model, the chipset number may help you with an online search. Try Motherboards.org 2. Overclocking is basically running a CPU higher than it's rated speed by adjusting the FSB, mutipliers, or both. I don't know if you have FSB capabilty over 66mhz...but possibly you have 75 or 83. When you raise the FSB, you also raise the PCI bus & the memory speed. PCI bus speed is either 33mhz or 1/2 FSB. 75mhz FSB (37.5mhz PCI) is usually not a problem, but 83mhz generally doesn't work if your only setting for PCI speed is 1/2 FSB...that's because most PCI cards can't handle running at 41.5mhz. If you have a jumper to lock PCI speed at 33mhz, you're in business, if not, 75mhz is probably the best you can do. Your memory has to handle the speed increase as well. If you have 72 pin SIMMS built to run at 66mhz, you should hit 75mhz without any probs, 83 mhz is doubtful. If your board accepts 168 pin SDRAM, you may be able to use PC100 or PC133...but some older socket 7 boards won't run the newer memory modules. That brings us to the multiplier. That should be fairly simple. Most boards list them as whole numbers (i.e. 1.5x, 2.0x, 2.5x, etc)...other list them as fractions (i.e. 3/2, 2/1, 5/2, etc). Chances are, your max multiplier setting is 3.0x (3/1)...however, the Pentium MMX sees the 1.5x (3/2) setting as 3.5x. That's how 233 is attainable (3.5 x 66). As a side note, the AMD K6-2 sees the 2.0x setting as 6.0x. 3. With a 233MMX, I can easily hit 250 (2.5 x 100). I've tried 250 (3.0 x 83) & 290.5 (3.5 x 83) & have been able to boot, but that's it. I think the PCI issue is what gave me problems. I don't recall trying 3.0 x 100mhz. You have a good shot with 262.5 (3.5 x 75) though. Even 225 (3.0 x 75) is better than 233 do to the FSB increase. Make sure to have a decent heatsink/fan & thermal paste. You don't need anything exotic...the old MMXs didn't have the major heat issues of today. You can get a good quality Socket 7 HSF for under $10.