Windows 95 , 98, and XP are all 32-bit operating systems that were common on computers with 32-bit processors. Windows Vista, Windows 7, and Windows 8 come in 64-bit versions.

The CPU (Central Processing Unit) has often been called the brains of the PC. But increasingly, that brain is being enhanced by another part of the PC is known as GPU (Graphics Processing Unit).

CPU can have multiple core units, those cores are a processor by itself, capable of execute a program but it is self contained on the same chip.

Cores is a hardware term that describes the number of independent central processing units in a single computing component (die or chip).

A Thread, or thread of execution, is a software term for the basic ordered sequence of instructions that can be passed through or processed by a single CPU core.

The Intel Turbo Boost Technology allows a processor to dynamically increase its clock speed whenever the need arises.

Only one thread can be served by one core at a time. So if a CPU is a dual core, then supposedly only two threads can be served simultaneously. However, Intel has a technology called Hyper-Threading. This enables a single core to serve multiple threads. Hyper-Threading is Intel’s technology for creating two logical cores in each physical core. In other words, to your operating system it appears as though your CPU has double the number of cores than it really does.

  • A Core i3, which is only a dual core, can actually serve two threads per core. In other words, a total of four threads can run simultaneously.
  • Some Core i5 processors are dual core, but most are quad core.
  • Core i7 processors, not only are they quad cores, they also support Hyper-Threading. Thus, a total of eight threads can run on them at the same time. Some Core i7 Extreme processors have six or eight cores. With 4 proper cores, and technology to create another 4 virtual cores, it has enough power for the most-demanding tasks.
Model Core i3 Core i5 Core i7
Number of cores 2 4 4
Hyper-threading Yes No Yes
Turbo boost No Yes Yes

Whenever the CPU finds that it keeps on using the same data over and over, it stores that data in its cache. Cache is just like RAM, only faster – because it’s built into the CPU itself.

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