We had intentions like all our other DDR memory roundups to overclock all the modules to their extremes but we did hit a wall at 217MHz FSB. When we moved above this speeds the processor became quite unstable and while all the modules didn't have any trouble getting to this speed we didn't get the chance to get any higher since our testing CPU is not multiplier unlocked and not an engineering sample which can be hard to come across sometimes, even in our position.
When testing the modules we used the built in divider (3:4) on the ABIT AA8 motherboard which would let us run the memory at 533MHz which is the default speed. When raising the front side bus to 217MHz and using the same divider a maximum speed of 289MHz (or 578MHz DDR) was able to be achieved on all modules due to our CPU limitation.
Hopefully in the near future a super clocking 775 Pentium 4 chip will arrive and we will be able to really test DDR-2 memory but for now let's see how they go with current generation processors in the retail market.
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