G.Skill 4GB DDR2-800 Pi Black Series Dual Channel Memory Kit Review
 

The G.Skill 4GB DDR2-800 Pi Black Series dual channel memory kit is an interesting new offering in the aging PC2-6400 DDR2 memory market. The kit was able to run at 800MHz with extremely tight timings of 4-4-4-12, while using a rather economical 1.8V. While the kit is rated for 1.9V, I found that much voltage wasn't necessary at stock speed, and was adequate for running the modules all the way up to 1000MHz.

http://www.bigbruin.com/2008/gskillpi6400_1