This technology was around since the dawn of XT and could be valuable for improving SQL performance.
RamDisk and RamDisk Plus®
RamDisk and RamDisk Plus offer dramatic improvement in the storage performance of servers and applications running on Windows Server 2003, Windows XP, and Windows 2000. Intel’s IoMeter benchmark reveals that our ramdrives typically show a 50 times performance gain over a physical hard disk. In many instances, that translates into an improvement of 3 to 10 times in overall application speed.