CDC 4GB 240p PC2-6400 CL6 36c 256×4 DDR2-800 2Rx4 1.8V ECC FBDIMM, $81;
CVT 4GB 240p PC2-6400 CL5 18c 256×8 DDR2-800 2Rx8 1.8V ECC FBDIMM, $81;
BZT 8GB 204p PC3-10600 CL9 16c 512×8 DDR3-1333 2Rx8 1.5V SODIMM, $99.