How would i go about overclocking my 395mhz AMD K6? I know i am going to need a big arse fan. Or even 2.
I was just wondering what the world would be like without search engines, and along comes HomeSlice to assist my feeble imagination.
Mine is overclocked. Not sure how, my buddy did it. You should only need one big fan. Thats all mine has. I have a AMD 300 running at 450. The first time we did it, the motherboard got burnt. So if you do figure out how to do it, be very careful.
Actually, there are a number of sites with advice about overclocking. To the best of my recollection, the site mentioned by dqa is more of a site about the latest and greatest top end for accomplishing this than a good introduction to the basics. It does have some intros at their “Beginners Tips” link, but there are some other sources. (They do have a fairly nice annotated directory of other sites of interest under their “Cool Links” button, that is also worth looking through.)
Anand has a good, older introduction (here)- which is a good one for you since the K6 you have is an older chip(by the way, 395 is not a standard speed for the K6 - you may already be overclocking.) Be warned that the AMD K6 series is kind of famous for having substantial heating issues, so cooling will be pretty important.
Ars Technica has a whole section on overclocking, which will give some background and general advice.
In general, with overclocking, you are trying to find a balance between providing enough energy to run the system faster than it is “supposed” to go, and keeping everything functioning correctly. This can involve either front side bus overclocking (where you make EVERYTHING go faster than spec - so any part of your system could mess up under the load and cause crashes, or other problems), or CPU overclocking (typically done by changing the “multiplier” that sets the ratio between your CPU speed and the system bus speed) that only affects the CPU.
You will certainly want to have good information about all of your components - know the make and model of your motherboard and any add-on cards, know the rated characteristics of your memory modules, know what processor you have, etc.
The guides on the above sites are far better than any advice I could put here - so check them out carefully and completely.
If your computer normally works at 110V, just plug it into 220V and you’ll see how unbelievably fast it goes! 
Overclocking is so five minutes ago.
With outrageously fast chips, a new trend is underclocking. Slow that chip down, and see how cool it’ll run. Why? So your computer doesn’t sound like a 747 when you fire it up – you don’t need as many fans with a cooler running CPU.
Something to consider: A K6 is pretty obsolete and getting more so every day. Fans and heatsinks and stuff are surprisingly expensive ($10 for a cheap plastic fan at the Shack). And overclocking is pretty much a crapshoot that will probably leave you with a less stable system than what you have now.
It might be cheaper and better to just get a new chip. Athlons cost nothing nowadays (nothing is defined for this purpose as $62 for a 950 Mhz processor). Just a thought.