Kingston HyperX Blu KHX1333C9D3B1/4G is a 512M x 64-bit (4GB) DDR3-1333MHz CL9 SDRAM memory module, based on sixteen 256M x 8-bit DDR3 FBGA components. The SPD is programmed to JEDEC standard latency DDR3-1333MHz timing of 9-9-9 at 1.5V. This 240-pin DIMM uses gold contact fingers and requires +1.5V.