Crucial Ballistix DDR2-533
 

In order to get more performance out of the Ballistix memory, we relaxed the memory timings to the JEDEC standard 4-4-4-12 and from the start, overclocked the our FSB to 220MHz, giving us a memory speed of 293MHz (now we're using the 3:4 FSB to DRAM ratio). The highest FSB we were able to run at 4-4-4-12 was 265MHz, giving us a final memory clock speed of 354MHz. We made a few stops along the way, benchmarking at 240, 250, and 255 MHz as well.

http://www.vr-zone.com/?i=1039&s=1

I heard that on some forums, people who had those sticks all feel robbed. Even though they are good, they aren't the powerful sticks they are supposed to be.