The new PC2-6400 Vista Upgrade edition is optimized for perfect compatibility for those transitioning from Microsoft Windows® XP to Vistaâ"¢. The OCZ Vista Upgrade series has gone through stringent testing with the full spectrum of Vista versions to deliver a perfect balance of memory performance and stability across the full range of applications. For gamers shifting to Vista and who prefer the performance of high speed memory, the PC2-6400 Vista Upgrade 2GB kit is the ultimate upgrade from 1GB of RAM ensuring the best possible gaming and productivity on Vista systems. Each memory module features a proprietary OCZ XTC (Xtreme Thermal Convection) heatspreader for the most effective heat dissipation. Furthermore, each OCZ Vista Upgrade module is 100% hand-tested for quality assurance and compatibility and is backed by an industry leading OCZ Lifetime Warranty and technical support for unparalleled peace of mind.