FUD Zilla heard a rumour that there might be some problems with overclocking Intel's Nehalem processor. The site says you can't feed the chip more than 1.65V and they also claim the CPU and memory voltage needs to be synchronous:
It’s not all rosy with Nehalem. We've learned that in spite of its 4GHz+ overclocking potential on air, that there are some limitations. You simply cannot get more than 1.65V to the chip which might be a limiting factor for high end overclocking.
Its gets better as the CPU and memory voltage have to be synchronous which implies that not all DDR3 memory will run with Nehalem. At this time you can forget all DDR3 2000 modules with voltages over 1.65V as they simply won’t work on current Nehalem motherboards.