Hardware Central schreef een review over de Pentium III E en vroeg zich af of dit de nieuwe Celeron 300A is. Wat betreft overklokbaarheid bleken de 500E en 550E het prima te doen, met als grootste probleem dat er behoorlijk snel geheugen nodig is om hoge busspeeds te bereiken (thanks Insane voor de tip):
Sadly, while we were in fact able to accomplish the same kind of success as with the Celeron 300A (+50%), it’s not as easily done. Firstly, the processor required fairly heavy increases in voltage to attain this level, and was not perfectly stable. Secondly, to achieve stability at that level may be out of reach for some as it would require extremely high-quality memory, placing too much pressure other components. The fact of the matter is that the Celeron 300A was a rare phenomenon. Its success was due not only to extreme overclockability but to the timing of its introduction. It’s doubtful we’ll ever see another processor capable of that degree of success.
On the bright side, the 500E is still an excellent and above average overclocker. 600 MHz is a virtual certainty, with 667 MHz almost guaranteed as well, though this may require a small increase in voltage. 750 MHz is not out of reach, but requires a solid platform and will likely demand an increase in voltage.
While not officially tested here, we would expect very similar results from the 550E. Using the same bus speed settings, 660 MHz should be a fairly safe bet, and 733 MHz shouldn’t be too far off.