Part Number Density Org. Speed Package K4B4G1646E-BCK0 4Gb 512M x 8 1600 Mbps 96FBGA K4B4G1646E-BCMA 4Gb 512M x 8 1866 Mbps 96FBGA K4B4G1646E-BCMA 4Gb 512M x 8 1600 Mbps 96FBGA K4B4G1646E-BYMA 4Gb 512M x 8 1866 Mbps 96FBGA K4B4G1646E-YCK0 4Gb 512M x 8 1600 Mbps 96FBGA K4B4G1646E-YCMA 4Gb 512M x 8 1866 Mbps 96FBGA