If ZDnet clock is indeed very simple to use, in reality it might not always provide the expected overclock experience expected.
Several reports we have collected from users and from the web indicate that it sometimes does not work at all. If it is too early to define rules, some users could achieve a substantial overclock while other could not even overclock the bus frequency by 1 MHz!
After performing several test, such variability seems to be linked to the RAM modules as we indicated yesterday it is the limiting factor. Some modules does simply not tolerate any change in working frequency, while others are more flexible and allow a substantial overclock as illustrated below: A 8-core Mac pro originally clocked at 3.2 GHz was pushed to 3.7 GHz and remain stable:
One should add that if the computer was stable, there were couple of small issues, audio output was slightly erratic, and the time
