"How to overclock?" This is one of the most common questions in amd users...

Introduction
First off, overclock process depends on several factors such as Front Bus Frequency (FSB), Multipler, vCore voltage, RAM, Cooling System and Power Supply Unit (PSU), Motherboard and processor itself. FSB, multipler and vcore voltage are changed in BIOS so, why are the other factors important to overclock? That's because:
1. The user has to rise the vcore voltage to get high results and when the voltage is rised, the processor temperature also rises very fast and one good cooling system assures lower temps, therefore, the processor will more probably run stable and safe;
2. The user has to pump up FSB and if the RAM doesn't handles with the higher frequences the system will experience stability problems (freezing, BSODs, crashes), therefore it's wise to get good DDR RAM (400Mhz PC3200 if the motherboard supports it or 333Mhz PC2700, at least), the RAM brands are also very important, be sure you get a good brand, i.e. Kingston or Corsair;
3. Pumping up the voltages will demand more power from the PSU, the good cooling system fans (or the water cooling system pumps) also will, therfore be sure you get a good PSU [350W or more depending the hardware (PCI cards, DVD, USB devices, HD, fans) installed in your rig] from a good brand (i.e. Antec). As far as PSUs are concerned, brands are very important!
4. There are motherboards that are indeed more overclockable and i know i.e. nForce2 chipset is "friendly" than KT600 chipset, refer to Anandtech, hardOCP and FastLaneHW (thanks to SDA for the links)
5. The XP mobile processors have more overclockability than the rest of XP series but, even between same XP processor core and specs, the user will find that some are better than others to OC and some get hotter than others. Every processor is unique just like people.

Overclock "best settings"
Many people ask me" what are the best settings to overclock" their rigs. Well, that's not that simple. Every processor, every system is unique though having the same core, specs, RAM, hardware, etc. As they are different, their "reactions" to this or that overclock settings can (and will) be different. The user just has to find out the "best settings" by his own.

Unlocked and Superlocked Multiplers
What is this all about? Before 2003 week 39, all AMD XP series processors leaft factory with unlocked multipliers. This means the user could change it in BIOS and get awsome overclockings because the user not only could change FSB but also multiplier. After that moment, AMD started to lock the XP series multipliers at factory (except the XP mobiles), therfore the users can't change it in BIOS and so far, no "wire trick" or any other "trick" unlocked the multiplers, that's why it's called "superlocked". I don't know why AMD did that but i suppose they were aware of what was going on, i mean, why would one user buy the 3200+ XP if he could buy one cheeper and make it run at 3200+ speeds? If it was so, i can perfectly understand AMD's point of view and agree with it.

How to overclock in processors with superlocked multiplers
The user can't change multipiers but can overclock via FSB
At boot, when you hear the speaker beep or while the system is testing the memory press the "DEL" key to enter BIOS (some motherboards needs other keys to enter BIOS, refer to user's guide for details) once there, scroll the menu and enter "Advanced Chipset Features" or something like that, pump up the "System frequency" (FSB) about 10Mhz above the default setting (i.e. for FSB 266Mhz processors, 143Mhz; for FSB 333Mhz processors, 176Mhz and for FSB 400Mhz processors 210Mhz). To do so, you must set the "system performance" from "optimal" to "user define" or "expert" whatever you BIOS says; save and reboot.
If the system reboots, get into Windows and test the system with Prime95 for several hours (overnight is great)
If the system fails the test, pump up the voltage in small steps, (if you are experience NO temperature problems) and test it always keeping an eye on temps.;
If at the time you reach the 1,85v setting, the system still fails the test, back down FSB.
If the system pass the test you can increase FSB in small 1Mhz steps and vcore voltage (if you're experience NO temperature problems), I insist that much in temperature because it's processor's enemy nº1.
Now, if the system doesn't reboot and the speacker becames to "talk", take it easy, all you have to do is to clean the CMOS. To do it, you must turn off PSU, take out the CMOS battery (looks like a niquel in motherboard), wait for 10secs and put it back, turn on PSU and reboot. In some mobos, it's needed to move the respective jumper or switch (refer to user's guide for details).
After rebooting you will probably get the message "default setup loaded" or something like that. Enter BIOS and set the FSB 2Mhz back the point were it crashed or, pump up the voltage only if you are experience NO temperature problems 1,85v is the "safe" voltage on air cooling systems.
In resume, that's it.

How to overclock in processors with unlocked multipliers
Well, the process is the same explained above except that user can change multipliers and get better results specially when combined with memory overclocking.

Another BIOS settings that can be used to overclock
This settings are related with the memory, they are the memory frequency, memory timings and DDR voltage. I'll not explain this issue, but you can find it deeply explained in www.ocforum.com. In advance i can say that lower values means more performance but less overclockability and vice-versa

Conclusion
Overclock is a easy process but must be donne with extreme caution and in small steps at a time. The user can't expect to obtain the same results others can, on the other hand, the user can expect more if his system's reactions to overclocking are better and stable, wich are always unpredictables. As you can see, it' s and "trial and error" process and sometimes, a little luck helps... Just don't forget to test the system and to keep it at safe temperatures or you can do serious damages to it.

a cpl of useful links
http://www.hyperformance-pc.com/overclocking_faq.htm
http://www.overclockersclub.com/overclockingfaq.php

not bad, but overclocking an AMD processor is way more risky than overclocking an INTEL processor...who is actually build for overclocking

yeah, but intel are always 1 step behind amd anways.

but overclocking is not good....

PC-world are ACE holes !!!!

they sold me a motherboard + CPU.
they told me the CPU was a 1.3Ghz athlon-tbird

the gave the the Athlon is an anti-static bag wth "1.33 Ghz" written on it.

so when i got home, i set the bios to run the CPU at at 1.3Ghz.

just over a year later, the CPU is dead !

further research or ID codes and hardware probes provved that infact, i had a 1.2Ghz athlon.

overclocking just 100Mhz send it it an early death JUST AFTER THE GUARANTEE RAN OUT !

now how f*cked up is that.....guess you can't trust ACE holes

the question i have is, Why overclock? Modern CPUs are stupid fast. There just isn't much to be gained from pushing your processor, but there is plenty to be lost: voiding the warranty, killing the processor, etc.

i agree. overclocking the FSB 10Mhz is not oing to show much difference.

linux has a program called "powernowd" which alters the cpu frequency depending on system load.

untill i start compileing something or playing a game, my 2.4Ghz cpu runs at 1Ghz at insanely cool tempretures (35 degrees, less on cold days)

You would be suprised on how much 10Mhz on the frons side bus can effect a computer's speed. I have an intel 2.6Ghz northwood P4, and I currently have it overclocked to 3.06 Ghz. Not only did it have a huge impact on my benchmark scores, I noticed a significant FPS increase on the Half-Life 2 demo.

For those people who are looking at getting a custom gaming rig, look at Falcon Northwest. From reviews I've read, they are absolutely awesome. The best part is, they will overclock your computer for you, which will not void the warranty

Overclocking is actually very bad and reduces the processor life, any way if you have a 2.8 Ghz processor there is no meaning for making it 3GHz or 3.2 ....If its like 3.6 then its ok if you can over clock more than 500-600Mhz more, depending on your system and cooling.

AMD ones are actully not made to be over clocked ( the spacial editions are)
But Intel ones can handle good overclocking, In ASIA / India they once started to sell Old 300-400mhz processors and overclocked them to 600 / 800!! and get more prize!!!


but

I have a really old Intel 800mhz desktop computer, and inside the bios there is a option to actually push the computer to the limit without actually overheating too much, so I don't need to add any fans inside or anything. And it runs way faster (for a 800mhz computer) I was thinking to add a bunch of resistors to my graphics card on my faster computer.

Like somebody said, most of the new computers, you don't really need to because it's already fast, and you can run pretty much anything off it. I only over clock older computers.

Only true in terms of overclocking, not in terms of efficient and fast chips (at least as of right now before AMD Phenom chips come out).

xboxrulz