The laptop processors are chips that drive and control the laptop’s functions, whose performance is determined by various parameters like, the number of cores, the speed of the core, Front Side Bus speed and the amount of cache.
Multiple core processors are obviously better in multi tasking than a single core. Since modern laptops run many tasks simultaneously, like browsing, email, anti virus and so on, dual core is noticeably better than a single core. Dual core processors offer the performance worth the money spent.
Processors work better with more GHz for simple tasks like browsing, checking, and email, watching videos, creating documents and listening to music and 1.7 GHz dual core would suffice. But to play games, use photo or video editors, a faster processor like 2.0 GHz dual core would be needed.
Usually, in processor specifications, it is common to see 667 MHz FSB, which means if there is more FSB, there would be a faster data transfer between the processor and the memory. Although faster FSB does not have a greater impact on the performance of the processor, like the speed of the core, it may be five to ten percent faster then 667 MHz FSB speed.
Additionally, the utility of the front side bus speed depends upon the tasks that are performed on the laptop. The cache is the amount of internal memory the processor has. This also does not affect the performance of the processor, but all the same, the more the better. Typically for modern processors, it may range from 512 kb to 3 MB