Kingston Hyper X X1 Black Series 8GB DDR3 1600 (PC3 12800) 240-Pin SDRAM Dual Channel Kit XMP LE with Free World of Tanks Premium Upgrade KHX1600C9D3X1K2/8GX 8GB Kit (2x4GB modules) of 1600 Mhz DDR3 Desktop Memory Utilizes HyperX module with faster latency timing for higher performance and speed Specifically designed and tested for compatibility in various makes and models of desktop computers Non-ECC Unbuffered 1600MHz CL9 240-pin DIMM type Ships with code for free premium account upgrade for World of Tanks