PC  Hardware  ePresentation

Looking Inside Of A PC
Hadi Ali

Our 4 Main Components of Focus

  •   RAM
  • CPU
  • HDD
  • USB 3.0


Random access memory, or (RAM) is the best known form of computer memory. RAM allows information to be stored and accessed quickly from random locations. Because information is accessed randomly instead of sequentially like a CD or hard drive, the computer can access the data much faster than it would if it was only reading the hard drive. However, RAM requires power in order to keep the data accessible, if power is lost, then all of the data is lost. While first being developed in its early years, RAM was measured in megabytes. However, due to development in technology, we find RAMs being measured in Gigabytes now. Nowadays, many budget PC's and laptops come with anywhere from 4-8GB of ram. Higher-end and gaming PC's have more expensive faster RAMs, which can have a capacity of 16-32GB. An example of an average and budget conscious model is the Kingston KTH-XW4400C6 4GB. Although it is not the most powerful on the market, a brand new stick can go for about $40-$50, while second hand ones can be found for even cheaper. One of the more popular gaming RAMs is the Kingston Technology HyperX 16GB. The HyperX is very popular because of  its faster speeds, higher data capability, and lower power consumption compared to its competition. The HyperX is much more expensive than the KTH-XW, costing approximately $200 brand new.


Commonly called the processor, the CPU is the brains of the computer,where most calculations take place. In terms of computing power, the            CPU (Central Processing Unit) is the most important component. Modern CPUs are small and square, and contain multiple metallic connectors or pins on the underside. The CPU is inserted directly into a CPU socket, pin side down, on the motherboard.

A typical CPU has 3 major components. The first is the arithmetic logic unit (ALU), which performs simple arithmetic and logical operations. Second is the control unit (CU), which manages the various components of the computer. It reads and interprets instructions from memory and transforms them into a series of signals to activate other parts of the computer. Third is the cache, which serves as high-speed memory where instructions can be copied to and retrieved. Early CPUs consisted of many separate components, but since the 1970s, they have been constructed as a single integrated unit called a microprocessor.

The speed that a CPU works at, is measured in "Hertz", or "Hz". Modern processors often run so fast that "Gigahertz", or "GHz", are used instead. One gigahertz is equal to one billion hertz. A budget-conscious model of a CPU is the Intel Pentium Processor. This processor is found in many computers, such as public school desktops, and is priced around $60-$70. An average CPU model is the Intel i3 processor, as it is quite reliable and powerful, with a more expensive price tag of around $120. One of the best current processors in the market, is the Intel i7. The i7 is very common amongst gamers and users who need a lot of processing power. The price tag for this processor is quite expensive, averaging at $350 online.

HDD (Hard Disk Drive)

The HDD or Hard Disk Drive, is a main storage media device, which permanently stores all data on a computer. Data sent to and from the hard drive, is interpreted by the disk controller. The disk controller tells the hard drive what to do, and how to move the components within the drive. When the operating system needs to read or write information, it examines the hard drive's File Allocation Table (FAT) to determine file location and available areas. The measurable property of an HDD is its capacity. Capacity is specified in terabytes (TB; 1 terabyte=1000 gigabytes) and gigabytes (GB; 1 gigabyte = 1 billion bytes). HDDs are connected to computer systems by interface cables, such as SATA (Serial ATA), USB or SAS (Serial attached SCSI) cables. A budget-conscious HDD model is the Western Digital WD Blue WD5000AAKX internal hard drive. This drive comes with a reasonable 500GB of storage, which is average for most low-power desktops and laptops, and averages around $40. An average model of an HDD is the Western Digital WD Blue WD10EZEX internal hard drive, which comes with 1TB of storage. This drive can support the needs of most basic computer users, and is a little more expensive, costing around $60-$70. A much higher end example would be the Seagate STBD6000100. This model contains 6TB of storage, and is much more useful for people with a lot of data storage needs. This drive is quite expensive however, and can cost up to $400 online.

USB 3.0

USB 3.0 is the upgrade of the Universal Serial Bus (USB) for computer connectivity. It offers the same easy plug and play capabilities as previous usb technology, but with a 10X increase in performance, and better power management. USBs were designed to transfer data, and connect devices such as keyboards, mouses, e.t.c. to personal computers, with much more ease than before. The attributes of USB systems are measured in transfer speeds. With it's new update, USB 3.0 added a new transfer mode called "SuperSpeed", capable of transferring data at up to 5 Gbp/s, which is more than ten times as fast as the speed of USB 2.0 (480 Mbp/s). USB drives are very common, and are used by many people for storing personal, or work data on the go. These drives are sold and measured by their memory capacity, which is in most cases, Gigabytes. A budget-conscious example of a USB 3.0 drive, is the Kingston Technology DataTraveler. The DataTraveler comes with USB 3.0 technology, and 16 GB of memory, which can hold 4,000 songs, 64 hours of video, and about 10,400 photos, costing around $12. A more advanced example could include the Sony MicroVault 64GB drive. This drive contains USB 3.0 capabilites, and also has 4 times the memory of the DataTraveler. This drive could be very useful for storing large important files, such as personal music albums, or family pictures. A very expensive and high-end model is the Kingston DataTraveler HyperX Predator. The HyperX Predator runs on USB 3.0, and can store up to 1TB of data on the go. It can reach transfer speeds of up to 240MB/s, and costs nearly $1,200 online.

Thanks For Reading!


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"What Is USB 3.0?" What Is USB 3.0? Web. 10 Nov. 2014. <http://www.kingston.com/en/usb/usb_30>.

"What Is Hard Drive?" What Is Hard Drive? Web. 10 Nov. 2014. <http://www.computerhope.com/jargon/h/harddriv.htm>.

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