Cache (MB/KB): A temporary storage area for frequently accessed or recently accessed data. Having certain data stored in a cache speeds up the operation of the computer. Cache size is measured in megabytes (MB) or kilobytes (KB).
Front Side Bus: The connecting path between the processor and other key components such as the memory controller hub. FSB speed is measured in GHz or MHz.
Clock Speed: Speed of the processor's internal clock, which dictates how fast the processor can process data. Clock speed is usually measured in GHz (gigahertz, or billions of pulses per second).

Intel® Core™2 Duo Processor
Maximum
everything. Energy-efficient
performance. Multimedia power.Based on
revolutionary Intel® Core™ microarchitecture, the breakthrough
Intel® Core™2 Duo processor family is designed to provide
powerful energy-efficient performance so you can do more at once
without slowing down.
With Intel® Core™2 Duo desktop processor, you'll
experience revolutionary performance, unbelievable system
responsiveness, and energy-efficiency second to none. And, you
won't have to slow down for virus scan, multiple compute
intensive programs, or multimedia downloads—these desktop
processors are up to 40 percent faster with improved
energy-efficiency¹.
Intel® Centrino® Duo mobile technology has just gotten a
mobility upgrade with the new Intel Core 2 Duo mobile processor.
Its advanced capabilities provide twice the multitasking
performance² with improved energy efficiency to enable better
battery life so you get the benefit of a powerful dual-core PC
plus all the benefits of mobility.+
Intel® Core™2 Extreme Quad-Core
Processor
Extreme dominance built-in. You've battled your enemies in this world and beyond, but never like this. With an Intel® Core™2 Extreme processor, you'll have the best desktop PC experiences for years to come. Bar none.
Now available in quad-coreIntel® Core™2 Quad Processor
Based on the revolutionary Intel® Core™ microarchitecture, the Intel® Core™2 Quad processor delivers four complete execution cores within a single processor, delivering unprecedented performance and responsiveness in multi-threaded and multi-tasking business and home use environments.
The Intel Core 2 Quad processor is at the center of today's most interactive and content rich software experiences. The Intel® P965 and 975X Express Chipsets support the Intel Core 2 Quad processor. This combination of processor and chipset is the ultimate engine for Intel® Viiv™ Technology-based PCs, offering an array of exciting capabilities and delivering an impressive level of performance for demanding users.
Intel® Core 2 Duo / Core 2 Quad / Core 2 Extreme(Socket LGA775) ( Boxed Intel® Desktop Processors )