iXBT Labs heeft een artikel gemaakt over het overclocken van de Celeron 566, de Coppermine 500 & 550. De benchmarks laten duidelijk zien dat een FSB van 150 MHz (op een BX plankje) heel gezond voor de performance is en dat een CPU die 50 MHz langzamer is derhalve toch een betere performance kan leveren 
. De conclusie van iXBT is dan ook dat het fijne dingetjes zijn om te tweaken:
In conclusion we would like to draw your attention to the economical side of the matter. The today's cheapest processor is Intel Celeron: only $100. It is about 70-80% lower than the cost of Intel Pentium 500 or 550. That's why if you don't have too much money at your disposal, Celeron will be the right choice for you. Besides, Celeron 566 performs nearly as good as some other processors for $180, which means that overclocking Celeron won't save too much. In this case Intel Pentium III 500 and 550 look much more attractive. You will have to spend $170-180 on one of the pieces. However, these huge (compared to Celeron) investments will easily pay you back during overclocking. The performance of the overclocked Intel Pentium III 500 will turn higher than that of Pentium III for $380. And a 550MHz model is even cooler than Pentium III 866 sold for $575. The benefit is evident.
[...] Intel Pentium III 500 and 550 proved perfect CPUs for overclocking. Increasing the FSB frequency up to 150MHz in the systems built on these processors results into the incredibly high performance gain. The overclocked CPUs perform very close to elder Intel Pentium III models. Unfortunately, not all 550MHz processors can boast such cool overclockability. However, if you really want to find one, you definitely will.
Our good old i440BX also showed its best. The system built on this chipset and working at 150MHz FSB once again proved that this chipset deserves its popularity among overclockers. We only hope that the upcoming i815 will become a suitable successor and will replace it in full.
