Showing posts with label between. Show all posts
Showing posts with label between. Show all posts

Saturday, March 25, 2017

Difference between CPU and GPU speed



Difference between CPU and GPU speed


  • For the longest time you were forced to spend on most powerful CPUs to get better performance. Now the GPU (Graphics Processor Unit) found on your graphics card, can now offload that work.
  • Four years ago Nvidia developed a programming environment called CUDA (Compute Unified Device Architecture) through which some program processes can be run on the graphics chip. Only Nvidia chips starting from GeForce 8000 series onwards supported this.
  • AMD also supports the general standard OpenCL, pioneered by a company called the khronos group (which Nvidia also supports) using which you can share your programs workloads on OpenCLs compatible processors (CPU and GPU). 
  • Even Microsoft approved of this development, equipping the new DirectX 11 instructions set with a new interface (Direct Compute) using which you can run program processes on the GPU. 

 
  • In an operation such as counting the no. of times a particular word in a book, CPU starts from page 1, go through the text word by word and ends at the last page but the GPU divides the book into many small parts, distributes them to all its stream cores, and then simply count the appearance of the word in a fraction of time.
 
 
  • Based on the GPU core design, a software must be divided into 240 parts ( 240 threads) to be able to use 240 stream cores as in GeForce GTX 295 but it is not as easy since many software programs cannot be parallelized or it is extremely difficult to do so, now even the current CPUs experience the same problem for dividing into 8 threads to use 8 virtual cores as in Core i7.
  • The actual real-world processes that best use this capability are found in video and scientific editing work where there are no book pages but instead repeated addition and multiplications of floating point numbers in big matrices that are carried out for thousands of numbers for the exact same operation.
  • In future, In order to run a software program at a lightning speed, each and every program line must be divided into several threads while creating and every processing step does not depends on the result of the previous process and thus it makes the program a complete parellelized one.
So the processing speed not only depends on the hardware but also the compatible software.

Reference :  CHIP Magazine April 2010

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Monday, March 20, 2017

Difference between GSM GPRS EDGE 3G WCDMA and HSDPA



Difference between GSM GPRS EDGE 3G WCDMA and HSDPA


Difference between GSM, GPRS, EDGE, 3G, WCDMA and HSDPA


Its a very basic and non-technical comparison.GSM

GSM, stands for Global Systems for Mobile Communications, is basic standard bearer of 2G technologies. It is mainly used in mobile communication. Short Messaging System (SMS) was introduced into GSM networks along with capability to download content from various service providers. The content could ring tone, logos and picture messages.

It can support Voice telephony and Data however the Data rate is only 9.6Kb/s, that is very low bit rate for date communication.GPRS

GPRS, stands for General Packet Radio Service, is used to give higher data speed over GSM. It is not the replacement of GSM. It is just a extension to the older GSM technology to gain faster speed.

Multimedia Messaging System or MMS is the feature of GPRS. It allowed subscribers to send videos, pictures, or sound clips to each other just like text messages. GPRS also provided mobile handset the ability to surf the Internet at dial-up speeds through WAP enabled sites.

GPRS offered higer bit rate ( Up to 171kb/s) by usage of A packet-linked technology over GSM.

EDGE
  • EDGE stands for Enhanced Data Rates for GSM Evolution. This technology, also termed as Enhanced GPRS.
  • This is a technology that uses the same equipment as GSM with only a few minor modifications to provide faster data speeds and is often regarded as a stepping stone towards 3G thus it is called 2.5G.
  • EDGE is a digital mobile phone technology but GPRS is a mobile data service.
  • It is a 3G Radio technology and GPRS or General Packet Radio Service is essentially packet oriented.



3G
  • The introduction of 3G changed a lot of the accepted standards in the mobile phone industry. It allows the use of a greater bandwidth that allows more features to be implemented on it.
  • 3G gives many features like video calls and TV applications because of the speed of 3G which began at 384kbps; well within DSL speeds. Further development on 3G technologies have also created even faster data rate reaching 3.6 and even 7.2Mbps.
  • Mobile phone Users are also required to switch mobile phones in order to take advantage of the new features of 3G.


WCDMA

3G Networks are based on WCDMA i.e. Wideband Code Division Multiple Access, a mobile technology that improves upon the capabilities of current GSM networks.

HSDPA

HSDPA (High Speed Downlink Packet Access) is what is also known as 3.5G, as it offers no substantial upgrade to the feature set of WCDMA, but improves the speed of data transmission to enhance those services.
WCDMA networks provides max 384kbps speed whileHSDPA allowed speeds above 384kbps, the most notable of which is 3.6Mbps and 7.2Mbps.

HSDPA has lower latency times and Fast Packet Scheduling compared to WCDMA.

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Saturday, March 18, 2017

What’s the Difference Between Sleep and Hibernate



What’s the Difference Between Sleep and Hibernate


Sleep Mode

Sleep mode is a power-saving state that is similar to pausing a DVD movie. All actions on the computer are stopped and any open documents and applications are put in memory. You can quickly resume normal, full-power operation within a few seconds. Sleep mode is basically the same thing as “Standby” mode.
The Sleep mode is useful if you want to stop working for a short period of time. The computer doesn’t use much power in Sleep mode.

Hibernate

The Hibernate mode saves your open documents and running applications to your hard disk and shuts down the computer, which means once your computer is in Hibernate mode, it uses zero power. Once the computer is powered back on, it will resume everything where you left off.
Use this mode if you won’t be using the laptop for an extended period of time, and you don’t want to close your documents.
Source : Howtogeek

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Saturday, January 7, 2017

What is the diffrence between an insulator and dielectric



What is the diffrence between an insulator and dielectric


What is the difference between an insulator and a dielectric?

This is a question that can be confusing to many engineers. This is because the terms "insulators" and "di-electrics" are often used interchangeably. Insulators are substances which permit very less current flow through them. Substance such as porcelain, wood are examples.

Dielectrics are also insulators. But, more specifically, they are materials which can be polarized. In dielectric materials, the electrons are bound to the nucleus and have limited movement. When an external voltage is applied to the dielectric, the nucleus of the atoms is attracted to the negative side and the electros are attracted to the positive side. Hence, the material gets polarized. This is a key feature of a dielectric.

Thus a dielectric can be defined as an insulator that can be polarized.  Thus all dielectrics are insulators, but all insulators are not dielectrics. A dielectric can thus store charge.  This characteristic makes it very useful in the form of capacitors.

Dielectric substances conduct very little electricity but are good supporters of electric fields. They also dissipate very less energy, i.e. have low dielectric loss.

Source : electrotechnik

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Thursday, December 1, 2016

TRANSFER FILES BETWEEN PC AND ANDROID USING WI FI



TRANSFER FILES BETWEEN PC AND ANDROID USING WI FI


           We generally use USB cables, Bluetooth to transfer files between PC and Android. With USB cable the transferring speed is high But daily usage of USB cable is sometimes irritating and annoying for most of the users to carry USB cable with them. So in this article I’ll explain How to transfer files between PC and AndroidUsing WI-FI by creating remote network between devices using third party applications.


There are lots of Android apps such as AirDroid, Web Sharing Lite, WiFi File Transfer are available on Google Play store which provides the facility to transfer files between computer and Android devices using Wi-Fi. All these files work by creating a common network between your PC and Android phone thus allowing you to transfer files between each other.

Transfer Files Between Android And PC Using AirDroid
AirDroid is a free and easy to use android app which helps us to manage our Android device via PCs web browser. AirDroid is used for both receiving and sending files between PC and Android Phone. No USB cable, Driver installation is required, Just install Airdroid app In your smart phones and enjoy transferring files between your PC and android phones.



airdroid file transfer


Steps to transfer files between Android and PC using AirDroid
Note: Connect to your PCs Wi-Fi network from your Android device.
1. Go to Google Play and Download AirDroid app and Install on your smart phone.
2. Once app is installed, Lanch the app and it will start AirDroid Server.
3. Here youll see web URL, IP address, Scan QR Code options on app.


wifi file transfer

4. On your PC, Go to AirDroid Web Interface. Youll see something like below image.

transfer files with Airdroid

5. Here you can see QR code is displayed on the home page. Simply scan this code with your phone, by pressing on the Scan QR Code button of the AirDroid App.
Once both the devices are connected, the model of your android device will appear at the top right screen of your PC.  
Transfer Files From PC To Android Device
To transfer a file to you android phone from PC, Just select the file tab from the AirDroid toolbox and click on the folder /file icon to select from any file from your PC and Click on Upload Button.

How Transfer files from android phone to PC with wifi

As soon as you select the file, AirDroid will start transferring the file to your android phone. Like wise you can also transfer entire folders to your android phone.

Transferring Files From Android Phone To PC
If you want to transfer files from your Android device to your PC, then you have to use the AirDroid web interface on your PC. All you need to do is click on the files icon from AirDroid’s web interface and select a file, right click on it and click on download option.

Wifi file transfer between android and PC

The file will be downloaded to your PC as regular downloads. You can find this file at Downloads section of your browser.

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Thursday, October 27, 2016

What is difference between MCB and MCCB



What is difference between MCB and MCCB


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Sunday, October 2, 2016

Difference between x86 32 bit or x64 64 bit architecture



Difference between x86 32 bit or x64 64 bit architecture


Difference Between 64 and 32 bit processors:

HISTORY:
 Both 32-bit and 64-bit architecture setups have been around for decades, but were mostly used in complicated enterprise computers like the IBM 7030 Stretch, built in 1961. 32-bit architecture was available to consumers in the 1980s, and the Intel 386 was one example.
 
ARCHITECTURE:
A 32 bit processor can represent numbers from 0 to 4,294,967,295  (32-bits wide) while a 64-bit processor can represent numbers from 0 to 18,446,744,073,709,551,615 (64-bits wide). Obviously this means your computer can do math with larger numbers, and be more efficient with smaller numbers. A 64-bit processor is made with more advanced silicon processes, have more transistors, and faster speeds. This is currently where the true benefit of switching to a 64-bit processor lays. 
  
Difference Between 32-bit and 64-bit OS:

In order to create a platform that is capable of running in 32 bit processors, 32 bit based operating systems and softwares were developed and similarly for 64-bit processors, 64-bit based operating systems were developed.
However, Windows did not become a 32-bit operating system until Windows 95. Windows XP was the first consumer version of Windows to receive a 32-bit edition and now in 64-bit edition.

RAM:
A 32-bit version of windows can access upto 4GB of RAM when paired with a 32-bit or 64-bit processor.
A 64-bit version of windows can access larger than 128GB of RAM when paired with a 64-bit processor.

File size:
A 32-bit version of windows can make use of Hard Drive upto 8TB and a single file size of upto 4GB.
A 64-bit version of windows can make use of Hard Drive larger than 8TB and a file size larger than 4GB.
 
Compatibility:
A 32-bit version of windows can be installed in computers having either 32-bit or 64-bit processor.
A 64-bit version of windows can only be installed in computers having 64-bit processor.
 
Compatibility Issues in Installing software:
Attempting to run a software program that was built for 32-bit version on a 64-bit version of windows may sometimes cause the program to crash and compatibility error occurs.
A program that was built for 64-bit version cannot be installed on 32-bit versions of windows.
 
 
As you can see, a sound argument can be made for both the cases and youll have to determine if the differences will benefit your situation and computing future and Ill leave the ultimate decision up to you.




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