What does it mean by Dual Core CPU ?

Question

EXPLAIN plz.

Answer 1

dual core
A single chip that contains two distinct CPUs that process simultaneously. The first dual core chips for x86-based PCs and servers were introduced in 2005 and include the Pentium D and Pentium Processor Extreme Edition 840 from Intel and the Opteron 800 and Athlon 64 X2 from AMD.


Increased Performance - Similar Power Consumption

Because the continual increase in single core clock speeds were using more and more power and generating excessive heat, dual cores were developed to expand performance without more heat. Dual core systems may use the same or a little bit more energy, but achieve approximately an 80% increase in processing power over single core CPU chips.


For Everybody

Dual-core chips are not just for advanced applications; rather, everyday tasks can take advantage of two simultaneous processing streams. For example, routine downloads of e-mail and software updates that increasingly take place in the background no longer slow down the foreground application. Virus scans and backup programs can be initiated without interfering with the primary task.

Dual-core CPUs are expected to gain significant momentum in the 2006-2010 time frame, not only in servers, but in desktop and laptop computers as well. See multicore, dual processor, Pentium D, Pentium Processor Extreme Edition, Core Duo and core.

Answer 2

In a nutshell, it's two CPU cores on one die.

Here's a good description for you:
http://en.wikipedia.org/wiki/Dual_core
http://www.tomshardware.com/2005/08/01/dual/
http://www.tomshardware.com/2006/07/14/core2_duo_knocks_out_athlon_64/

Answer 3

Means that there's 2 CPU's inside. Faster, more efficient...

Answer 4

2 cores for multitasking. (ex. encode dvd while surfing internet and listening to music without lag)