Exceleram EP3001A PC3-10666 2x2GB Memory Review
 

The new EP3001A memory modules from Exceleram are using Powerchip Rev D 128x8 and even if the rating is PC3-10666, they are very overclockable and come at a very affordable price

http://www.madshrimps.be/articles/article/1000138

that's a very sharp price; €38 for 4Gb DDR3.