Part of CD SpeedTools™. Aloows you to allocate a portion of your computer's RAM to tune and accelerate CD-ROM data access performance. This cache control panel allows for up to eleven different directory cache size selections. Because the directory cache uses your computer RAM, you will want to consider your selection carefully. In general, users who use thier CD-ROM drive frequently will want a larger directory cache, while users who rarely use their CD-ROM drive will want a smaller directory cache.