2GB 1333MHz DDR3 Non-ECC CL9 DIMM (Kit of 2)...Standard 128M X 64 Non-ECC 1333MHz 240-pin Unbuffered DIMM (SDRAM-DDR3, 1.5V, CL9, FBGA, Gold). ValueRAM's KVR1333D3N9K2/2G is a kit of two 128M x 64-bit 1GB (1024MB) DDR3-1333 CL9 SDRAM (Synchronous DRAM) memory modules, based on sixteen 64M x 8-bit DDR3-1333 FBGA components per module. The SPDs are programmed to JEDEC standard latency 1333Mhz timing of 9-9-9 at 1.5V. This 240-pin DIMM uses gold contact fingers and requires +1.5V.