Crucial memory modules include memory for the fastest available processors and chipsets. The Ballistix PC2-8000 is designed to run up to 1000MHz, and at least according to the official specs, at 2.2V.
According to our tests, the memory reached 553.50MHz with the voltage at 2.3V. Of course, that is higher than what the memory has been designed for (2.2V), so it may cause some problems with certain motherboards. On the bright side, you can use aggressive timings for lower speeds, down to 3-3-2-4 at DDR533 (1:1) that can be used for high FSB overclocking (up to 500) with Intel's Core2Duo processors. Before buying this memory kit, be sure to check your motherboard support list to avoid any possible incompatibilities.
Overall, we were pleased with the Crucial's Ballistix PC2-8000 2x1GB kits performance. The retail price for the kit is around US$555, as listed on the Crucial website. We think that such high priced memory will probably be bought mostly by enthusiasts looking for that little bit extra in overclocking, at least at 1:1 with low CL3 timings.