PQI TURBOmemory DDR2 2GB PC2-4200 dual channel kit consists of two ultra-high-speed 1GB memory modules that are capable of achieving extreme 533MHz at latency 3-3-3-8. PQI utilizes cutting-edge technology in ICs sorting to select the highest quality ICs capable of running at the highest possible frequency. PQI24200-2GDB comes with elegant quality Mirrored Black Copper heat spreader to enable efficient heat dissipation. All PQI TURBOmemory DDR2 modules have been rigorously tested to perform superbly at its rated speed and come with lifetime warranty.