Some index structures have been redesigned to minimize the cache misses and improve their CPU cache performances. The cache sensitive B+- tree and recently developed cache sensitive T-tree are the most well-known cache conscious index structures. Their performance evaluations, however, were made in single core CPU machines. Now-a-days, even the desktop computers are equipped with multi-core CPU processors. In this paper, the authors present an experimental performance study to show how cache conscious trees perform on different types of CPU processors that are available in the market these days.