Actually Connie I would have to disagree. The Classic athlon is still a little bit superior to the duron on almost all apps. The 512k l2 cache running at 1/2 to 1/3 cpu clock is still better than 64k at full clock. This will depend on how heavy the program hits the ram. Once Durons 64k of l2 cache is depleted it has to go to system memory running at 133 mhz. This happens alot less frequently with the classic athlon (remember it has 512k). so where a calculation may be performed by the classic in the cpu's cache the duron might need to resort to system ram thus giving a slow down in performance.
A little bit of knowledge is a dangerous thing!