- Dual Core: Two cores.
- Quad Core: Four cores.
- Hexa Core: Six cores.
- Octo Core: Eight cores.
- Deca Core: Ten cores.
CPU and Cores - Comparison
Clock Speed vs. Cores
CPUs have a clock speed – think of it as how fast the CPU does work. (That’s actually an imperfect analogy as the truth is a lot more complicated, but it will have to do for now.)
For example, Intel’s Core i5-3330 processor has a clock speed of 3 GHz and is a quad-core processor, which means it has four cores. All four cores in this Intel i5 processor are each running at 3 GHz.
Doubling The Cores Doesn’t Double The Speed
Many computer programs are single-threaded, which means that their work can’t be divided across multiple CPUs. They must each run on a single CPU. This means that doubling the cores won’t double their performance.
If you have a single-threaded application running on a 3 GHz quad-core CPU, that application will run at 3 GHz — not 12 GHz. It will use one core and the other three cores will sit idle, waiting for other tasks to perform.
Writing properly multithreaded applications that can scale across several CPUs at once is actually a difficult problem in computer science. It’s becoming a more crucial problem, as the future looks to be computers with more and more cores instead of fewer cores at faster and faster speeds.
Some applications can take advantage of multiple cores. Google Chrome’s multi-process architecture allows it to perform actions across several different cores at once. Some computer games can divide their calculations across multiple separate cores at once.
However, most of the applications you use are likely single-threaded. A quad-core CPU won’t run Microsoft Office twice as fast as a dual-core CPU. If all you do is run Microsoft Office, the performance might be extremely similar.
More cores help if you’re looking to do more at once or if you have a multithreaded application that can take advantage of them. For example, if you’re running several virtual machines while encoding video, extracting files, and doing other CPU-demanding things on your computer, an octo-core CPU may be able to keep up while even a quad-core CPU may stumble under such load.
Dual Core, Quad Core & More
Phrases like “dual core,” “quad core,” and “octo core” all just refer to the number of cores a CPU has:
Controlling & Monitoring Cores
You can actually control which running programs can use a core from the Windows task manager. Right-click a process on the Processes pane and select Set Affinity.
You’ll be able to select which physical CPUs (cores) the application can run on. You shouldn’t need to tweak this most of the time, although it can be helpful when you want to restrict a demanding application to certain cores or avoid bugs in old PC games.
From the task manager, you can also use the Performance tab to view the usage of all your CPU cores.
You can see no. of cores in taskbar of windows 8.1 in older windows follow this method
Open a command prompt by pressing Windows Key + x + a and paste in the following command:
WMIC CPU Get /Format:List
Scroll down and look for NumberOfCores and NumberOfLogicalProcessors. From the graphic above you can see I have a quad core processor
Hyper-Threading
Intel CPUs use a technology referred to as “hyper-threading technology.” With hyper-threading, each physical core presents itself to the system as two logical cores. In the screenshot above, we’re not using an octo-core CPU – we’re using a quad-core CPU with hyper-threading.
This improves performance to some degree, but a quad-core CPU with hyper-threading is nowhere near as good as an octo-core CPU. You still only have four physical cores, although some tricks allow them to do a bit more work at once.
Sources :
http://www.fixedbyvonnie.com/2014/04/can-tell-many-cpu-cores-windows-8/
Qmobile X25 opened
I unscrewed Qmobile X25 and that's what I got:
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| Qmobile X25 inside |
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| Qmobile X25 inside |
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| Qmobile X25 inside (tilted) |
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