Difference between speaker and microphone

However, in all likelyhood, the microphone is a Electret Microphone, which uses a capacitor which varies in capacitance in response to air pressure waves, e.g. sound. ... Speakers generally have lower impedance than microphones. Otherwise they are really the same thing, a transformer between sound and electrical energy

Here's a list of some motherboard brands.

Here's a list of some motherboard brands.

• Asus. Accepted as the world's largest motherboard manufacturer, Asustek Computer International is planning on expanding sales by 20% this year and is planning on achieving 50% of the global market by 2014. ...
• Gigabyte. ...
• MSI. ...
• ECS. ...
• Intel.

Difference between amd and intel processor

On the high end, such as in cases where you'll be pairing your CPU with a powerful AMD or Nvidia GPU, an Intel processor is the better option. In this case, using an Intel Core i3 or i5 CPU rather than an AMDequivalent can make the difference between 15 and 30 frames per second

Difference between desktop and all-in-one desktop

An all in one computer is basically a monitor in which you just plug in your mouse and keyboard, all the hardware are inside the monitor's case. While a desktop is made of a monitor + unit (motherboard, video card, RAM etc) in which you plug in your mouse and keyboard.

Difference between graphic card and video card

An integrated graphics processing unit (GPU) doesn't use its own RAM; it utilizes the system's memory instead. So, if you have a computer with 4GB of RAM, thevideo card can use anywhere between one and five percent of the available memory for graphics processing.
   

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How can you differentiate between a laptop hard drive and a desktop hard drive

Usually by the physical size of the device.

Typically desktop drives come in a 3.5″ enclosure like this;

(nowadays there are exceptions for SSD disks)

Laptop drives are usually 2.5″ or sometimes 1.8″ like this;

It is possible to use a laptop drive (both traditional mechanical, spinning disk and SSD) in a desktop, but not a desktop drive in a laptop. As you can see physical space for the desktop drive inside the laptop is usually the constraint.