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What is Dual Core Technology?

By R. Kayne
Updated May 16, 2024
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Dual core technology refers to two individual microprocessors on a single die cast chip. This is essentially two computer processing units (CPUs) in one. The advantage of a this type of chip is that tasks can be carried out in parallel streams, decreasing processing time. This is referred to as thread-level parallelism (TLP).

TLP is also possible on motherboards that can accommodate two separate CPU dies. When TLP is accomplished in a single CPU through dual core technology, it is called chip-level multiprocessing (CLM).

In CPUs with more than one core, each microprocessor generally has its own on-board cache, known as Level 1 (L1) cache. L1 cache significantly improves system performance, because it is much faster to access on-chip cache than to use random access memory (RAM). L1 cache is accessed at microprocessor speeds.

Dual core chips also commonly feature secondary shared cache on the CPU, known as Level 2 (L2) cache. Motherboards may also have a cache chip designated as Level 3 (L3) cache. While faster than RAM, L3 cache is slower than cache built into chip.

Dual core technology has advantages over double-core or twin-core technology. These latter terms refer to two independent CPUs installed on the same motherboard. Dual core chips take up less real estate on the motherboard, have greater cache coherency, and consume less power than two independent CPUs. However, this technology also has its drawbacks.

For software to take advantage of multiple core architecture, it must be written to utilize parallel threading. Otherwise, the program functions in single-core mode, using just one data stream or one of the built-in microprocessors. Unfortunately, coding for TLP is quite intensive, as interleaving shared data can create errors and slow performance. Because of these and other issues, a dual core processor does not deliver twice the speed of a single-core processor, though there is a significant increase in performance under optimal conditions. Finally, dual core chips run hotter than their single-core cousins.

Whether a this type of processor is right for you will depend on what you plan to use your computer for. If the programs you regularly require are designed for TLP, then you may benefit greatly from a multi-core chip. If not, you may be better served by a high-end single-core CPU.

EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
By anon331292 — On Apr 22, 2013

The difference between a pentium 4 and dual core and core 2 duo is the architecture. Teoriticalli is dual core and works twice as fast as the pentium 4. The difference between dual core and core 2 duo is the architecture. Also, the core 2 duo is more perfect. It is more efficient in power, heat and speed.

By anon171921 — On May 02, 2011

What is the difference between dual core and core 2 duo?

By anon158134 — On Mar 06, 2011

Is it correct that a duo-core processor executes a program two times faster than a single-core processor, a quad-core processor four times faster than a single-core processor?

By anon40659 — On Aug 10, 2009

what's the difference between intel core 2 duo processor t6500 2.1ghz and 2.2ghz and 2.4 ghz?

By anon39344 — On Jul 31, 2009

what is the difference between dual core and pentium 4?

By anon30743 — On Apr 23, 2009

When a dual core processor speed is stated, is that speed for each core or for the combined unit? For instance, is a 3.2ghz dual core processor 3.2ghz for each core or is it 3.2ghz for the combined cores (2 cores at 1.6ghz each)?

By anon30687 — On Apr 22, 2009

I have an Intel Pentium 4 3.4g and a Pentium R dual core 2.7g. Which is better?

By anon5749 — On Dec 05, 2007

what is difference between pentium 4 3 ghz and dual core 2.66 ghz?

if the requirement is 3 ghz and i have 2.66 ghz dual core processor then will it work?

By anon5034 — On Nov 10, 2007

What is the difference between dual core, core 2 duo and quad core?

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