The RAM disk has been around since the 1980s, but it has never been popular due to the high cost of computer memory. It is now making a comeback, partly because RAM is now cheap and plentiful and partly because solid state drives (SSDs) are fast replacing hard disk drives as the storage medium of choice.
SSDs are not only much faster than hard disk drives, they are silent and virtually impervious to vibration and shock. The downside though is their limited lifespan. That's where the RAM disk comes in - it allows the user to reduce wear and tear on the SSD by shifting some of the work to it.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips