Intel Core 2 Duo T9400 2.53 GHz Processor - Socket P PGA-478 - Dual-core - 1066 MHz Bus Speed - 1. The Intel Core 2 Duo processor is Intel's second-generation mobile dual-core processor designed to deliver breakthrough performance and great power savings. With an Intel Centrino processor technology-based laptop with the new Intel Core 2 Duo processor, you can enjoy a greater than 20% performance increase when doing processor-intensive tasks like multitasking compared to previous-generation laptops with Intel Core Duo processors.