Hyper X 2GB 800MHz DDR2 Non-ECC Low-Latency CL4 (4-4-4-12) DIMM...Standard 256M X 64 Non-ECC 800MHz 240-pin Unbuffered DIMM (SDRAM-DDR2, 2.0V, CL4, Gold). SPD timings are 5-5-5-15 on bootup, but may be overclocked to 4-4-4-12 low latency timings. Kingston 256M x 64-bit 2GB (2048MB) DDR2-800 CL4 SDRAM (Synchronous DRAM) memory module, based on sixteen 128M x 8-bit DDR2 FBGA components per module. This module has been tested to run at DDR2 800MHz at low latency timing of 4-4-4-12 at 1.95V. The SPD is programmed to JEDEC standard latency 667Mhz timing of 5-5-5-15 at 1.8V. This 240-pin DIMM uses gold contact fingers and requires +1.8V.