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Defining USB, Types & How Do They Work?









USB or Universal Serial Bus was introduced in 1994 by Intel Corp although the official version 1.0 wasn't released until 1996.  Due to it's early limitations (mostly timing problem and lack of HUBs), it wasn't until version 1.1 was released in August of 1998 that USB began to gain acceptance.  It is now the De-Facto Standard for PC connectivity.   Mouse, printer, digital camera, webcam, speaker, modem, network connection…etc can now be interfaced to the PC with relative ease (plug and Play).  Offering speed mobilty and flexibility to you peripheral devices. USB can offer low power to these devices of 5 volts DC (See Chart Below).   In the early days of USB only 150MA or .75 watts of power was supplied if you drew too much power your computers' power supply would shut down due to an over-currnet condition, thus requiring you to power down you computer and power it back on again.  If this occured too often you power supply over-current protection circuits would become week eventually require replacing.  For that reason USB devices requiring  high power came with it's own power supply (either internal or external).


USB can connect up to 127 devices through the use of HUBs (Hollow Ugly Boxes...LOL). although power is not passed through the hub. If the hub is powered, it can provide power to any devices connected to it.


Upgrading a computer? Best hardware upgrades. Steps to install. How PC hardware & OS optimize their performance. Learn here and also follow the links to a series of articles detailing main computer components.

Updating PC and OS


In this article I am going to explain the steps I went through to update my PC. This may offer some practical ideas on how to do your own computer upgrade.  While most people will say "just buy a new one".  For this project I wanted to save some money, perhaps enough to buy a little more than my budget would have allowed, if I had taken their advice.  I also purchased an OS upgrade for Windows 8 for the low price of $39 in late February 2013 and thought I could take my time on the upgrade, only to discover later that I had until the end of that month to use it or loose it. I did manage to install the Windows 8 upgrade on time to add its features to my computer upgrade.


First of all I had to decide on a CPU.  Intel is priced a little more than AMD.  After doing research.  See article on AMD Phenom II.  I chose the AMD Phenom II CPU. Although AMD made a newer model CPU, this one is a true Quad-core covering my requirements.


The next step was the Motherboard.  According to my computer needs and budget for this upgrade, my primary option was a major name brand which was "dead on arrival" (it happened twice, luckily under manufacturers & store warranty). To avoid or minimize statistically the possibility of another DOA motherboard  I settled on Gigabyte 970A-D3. A brand that I have used before and performs well. See article on Motherboard reviews.


My first choice for Motherboards had everything built in , including  IDE and floppy interface and was compatible with my old power supply 4 pin CPU power connector, my existing hard drive, CDROM and Memory...


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