Kingston HyperX 4GB (2048MB x 2) DDR2 1066MHz PC2-8500 Kit

HyperX DDR2 memory modules offer faster speeds, lower latencies, higher data bandwidths and lower power consumption than DDR memory. DDR2 memory modules are not backwards compatible with DDR-based motherboards, due to incompatible module connections, voltage and DRAM technology. DDR2 HyperX is available in speeds ranging from PC2-4300 to PC2-9600 and in 1GB and 2GB dual-channel kits.