The Centrino Duo was the earlier iteration and the Centrino 2 is the successor to the Centrino Duo. The Centrino Duo processors came with a 800MHz front-side bus and CPU clock speeds up to 2.4GHz. The Centrino 2 processors had an improved 1,066MHz front-side bus and were available with CPU clock speeds up to 3.06GHz.
The Intel Core2 Duo P9400 averaged 62.3% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list .Intel® Core™2 Duo Processor T5200 (2M Cache, 1.60 GHz, 533 MHz FSB) quick reference with specifications, features, and technologies.
The Intel Core 2 Duo T7300 was a mid range dual core processor for laptops. It is based on the old Merom core featuring the full 4 MB level 2 cache nad Virtualization functions VT-x. Series.
The slowest and the most affordable of these “Penryn” CPUs are the Core 2 Duo T8100 at 2.1GHz and T8300 at 2.4GHz, both with 3MB of L2 cache. These processors are priced at $209 and $241, respectively. The higher-end 2.5GHz T9300 for $316 and 2.6GHz T9500 for $530 feature 6MB of L2 cache. Among the first 45nm mobile processors, the most TxIV.