Boost the performance of your PC to its maximum capability. PNY memory upgrades will prove to be an outstanding value both now and in the future. PNYs DDR desktop memory is the perfect upgrade to boost the performance of your PC for casual gaming or your Windows 7 experience. Delivering faster speeds, greater bandwidth, lower power consumption and enhanced thermal performance, memory improves overall system performance for an outstanding value with options compatible with all popular desktop PCs.DDR (Double Data Rate) SDRAM is a DRAM technology that supports data transfers on both the rising and the falling edges of each clock cycle. This effectively doubles the memory chip's data throughput and is more efficient than legacy SDR technology.PNY manufactures DDR memory upgrades rated at PC2100, PC2700, and PC3200. They are compatible with desktop and notebook computers and processors, such as Intel's Pentium, Celeron, AMD's Athlon, Sempron and others. PNY upgrade modules are compatible with systems from Apple, Compaq, DELL, Gateway, HP, IBM and over 5,000 other systems.