Covington was the first Celeron and it sold briefly on the slot 1 platform at the restrictive speeds of 266 and 300MHz. One of the major downfalls of this first Celeron was that it lacked L2 cache, forcing it into a position of underdog. Yet after much bad press and critic bashing, Intel released a modified addition, called Mendocino and was, in a large way, a welcome improvement for Intel. It was of this family that Intel spawned the famous Celeron 300A processors, which in almost all cases, could achieve a 100MHz FSB and a 450MHz clock. The Basics One must keep in mind, however that not all Celerons achieve very high clocks speeds, some are prone to failure, and you can never tell if one chip is good without trying it out.
Luck is one of the keywords.
Back in the old days, you could overclock simply by changing the multiplier, but then Intel and AMD got greedy, they fixed the multiplier to ensure that overclocking died out, oh and fight that other thing called CPU re-labelling. These little jumps provide a perfect opportunity for overclockers to take little jumps and test the water temperature for a possible swim in the lake of serious overclocking. For some, lucky enough to own a sophisticated board of elegance, a real overclockers favourite, a board which allows you to jump 1MHz at a time, perfect for testing the very limits of your Celeron's capacity. Once you even think about touching the voltage jumpers, you are no longer an innocent dabbler, you are serious. With this new plain also comes serious risk to your computer hardware.