This G.Skill dual channel kit consists of two 2GB DDR2-800 memory modules in DIMM form factor (PC2-6400). Total capacity is 4GB. The modules with 6-layer PCB are equipped with blue coolers and programmed to latencies of 5-5-5-15 at 800MHz. DDR2 memory has improved signal quality, lower power consumption and hence lower power dissipation compared to DDR memory.