Posts Tagged Home Computers

Difference Between Computer Rental and Computer Leasing

Difference Between Computer Rental and Computer Leasing
If you have a need for a computer for your home or business, but cannot afford to buy one outright, you have two basic options: you can rent a computer or you can lease one. While these two options may seem very similar, there are actually major differences between renting and leasing. Both are convenient, but for different situations. Understanding these differences will help you choose the best option for your needs.

What Is Renting a Computer

Renting a computer is a lot like renting a car. This is usually done for a temporary and short need for a computer. You pay a fee, which is far less than the cost of actually buying a computer, and are given a computer to use. This can be just one computer or it can be a complete network, depending on your needs, but you will only be using the equipment for a short period of time, ranging from a few days to a few months.

When Renting a Computer Works Well

When would you want to rent a computer? There are many situations when it might be convenient. Consider these options:

• School – Do you want to offer a short computer training program at your school or college setting? Renting a setup would save you money, and you could charge an additional fee to your students who wish to take the class. When the training period is over, you simply return the equipment.

• Conventions – When you present at a convention, you may wish to have specialized equipment to use to display your PowerPoint presentation. Instead of lugging your own equipment with you, dealing with it at the airport, and setting it up once you arrive at your location, you can rent the gear, have it set up for you when you arrive, and simply bring your presentation on a disk or drive.

• Travel – In general, traveling is a time when carrying your computer is difficult, particularly if you do not have a laptop. When you rent a computer, you can have it ready, configured, and waiting for you at your destination.

• Temporary moves – When businesses move into temporary settings, setting up and then quickly taking down an entire technology infrastructure is highly inconvenient. Renting for this short period of time eliminates this problem.

Computers and other specialized equipment can also be rented to help deal with special projects. For instance, if you have a big project coming online that would require an extra printer or computer, you can rent it for the duration of the project, rather than buying it and having it sit unused most of the year.

What Is Leasing a Computer?

Leasing a computer, like leasing a car, is a more long-term commitment. You will sign a lease agreement for a set period, such as a year or longer, and if you back out of the agreement you will pay a penalty. You will typically pay monthly for the equipment you are using, and technical support is often included in the package. Sometimes the agreement allows you to rent to own, but the main benefit of leasing is the fact that leasing computer equipment cost a lot less at the outset than buying it.

When Leasing Makes Sense

Leasing makes sense when a business does not have enough capital to buy computer equipment, yet must have it for long term needs. If your business needs computer equipment, but you cannot afford to buy it, leasing allows you to avoid taking on debt to meet your need. You can preserve your lines of credit for other potential expenses. Leasing a computer also works well for individuals who need one but cannot afford to buy one, and there are many rental companies that offer individual leases for home computers. Basically, any time you or your business needs a computer but cannot afford to buy one, leasing is a convenient option.

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GPU computing – high performance computing at its best

GPU computing - high performance computing at its best
A graphics processing unit (GPU) is a RISC processor used in video game systems and computers for calculating the graphical output for monitors. GPUs are used at manipulating and displaying computer graphics. GPUs are a part of mother board or they can come along with video cards. Graphic accelerators are a part of GPU also. High performance GPU computing involves solving advanced computational problems using supercomputers and computer clusters. GPU computing includes all tasks that a graphics processing unit can calculate.

In GPU computing the CPU calculations are replaced by Graphics Processing Units. Migrating large scale algorithms and entire kernel onto the GPU co-processors help in arriving at the answer much faster and thus decreases the processing time. GPUs are never a complete replacement for CPUs but complementary. Parallel operation of CPU and GPU has found to increase the performance. CPU’s offload the tasks which are better performed by GPU leading to high performance computing. GPU excel CPU’s in certain computational tasks.

A GPU’s processing power is mostly used while dealing with 3D scenes and video. The GPU computing for a graphics task such as rendering a 3D scene involves many stages like vertex processing, vertices grouping, fragment processing and mathematical operations. GPU computing is also known as General Purpose Computation on Graphics Processing Unit. Acceleration of video and picture editing, artificial intelligence and physics calculations come under the tasks of GPU computing.

GPU uses Advanced Graphics Port (AGP) to communicate with the mother board of a computer. Programmable shaders capable of manipulating vertices and textures are supported by latest GPUs. Very high precision color spaces, over sampling and interpolation techniques to reduce aliasing are also supported by GPU. GPU can process multiple independent vertices and fragments in parallel. Moreover a variety of computational resources are available on the GPU.

Multi-GPU’s are also available and are generally used in high-end home computers to accelerate computer games. Multi-GPU systems use more than one GPU. An example of multi-GPU system is Nvidia which can make a PC perform 250 times faster than usual. Not only that but by making use of the CUDA architecture which is made up ofhundreds of processors cores data set can be easily crunched via the application. General Purpose computing on graphics processing unit uses a GPU to perform computation in applications traditionally handled by CPUs. Additional programmable stages are included to make this happen. The general Purpose Computing on GPU(GPGPU)has cleared new ways in diverse fields like scientific image processing, oil exploration, linear algebra and 3D reconstruction.

GP GPUs are used in computer clusters, physics engines, FFT, audio signal processing, digital image processing, bioinformatics, scientific computing, DSP, neural networks and many more. GPU computing CUDA was developed by Nvidia. AMD has announced a super computer based on GPU which will be built of more than thousand GPUs. This supercomputer will have a computing power of one petaflop. The processing power of GPUs have further increased due to the advent of OpenGL API and similar functionalities in DirectX. Intel, AMD/ATI, NVIDIA and S3 Graphics are some of the players in the market who produce GPUs. Many companies are now engaged in researches to find out the further benefits of GPU computing.

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Hurricane Proof Computer

Hurricane Proof Computer
Hurricanes cause billions of dollars in damage each year, including damage to computers. Unfortunately, computers can be much harder to replace if lost than other electronics because of the data contained on their hard drives and time spent tweaking and overclocking them. Being a Katrina evacuee and survivor myself, I know how important a computer can be after a natural disaster. With hurricane season looming in the days ahead, I decided to write a guide to help people protect their computers and data during a natural disaster.

Part I: Backing Up Data And Things to Have

Hurricane season or not, you should always be backing up your data. Whether you plan on riding out the storm (a bad idea) or evacuating to another location, you should have a backup of your computer data either on an external hard drive or optical media such as CD-Rs or a DVD. Be sure to keep your data in a very safe place, such as a water proof safe. Never leave your backup by your computer.

Next, you should have the following things to make life after the storm easier:

  1. Phone numbers for insurance, computer or computer parts companies, and phone numbers for all local ISPs (including dial-up and satellite). Having your insurance phone number and phone numbers for your computer company will help get your computer replaced faster if it is damaged. I can’t stress enough how important it is for you to have phone numbers and even access disks for all of your local ISPs! After Katrina, the Internet was the only way many people could contact the outside world. As fate would have it, my broadband was down for 3 weeks and none of the other broadband ISPs would except new orders due to the storm, leaving me with my old friend Dial Up, whom I thought I had buried 8 years ago. Your best bet is to use a satellite ISP as they have no equipment that can be destroyed by a hurricane and cause an outage.

  2. Back ups of all your file, have all application and game discs, CD keys, drivers, and operating system discs on hand.

  3. Photos of your computer as well as proof of what parts are inside.

In the event your quad SLI rig is destroyed, you don’t want your insurance company to replace it with something of a significantly lesser value, do you? It’s very easy for people to claim “I had this, this, and this and it all cost me $3000 last month.” after their 3 year old Athlon XP rig is destroyed. As a result, your insurance company may be hesitant to replace your expensive computer parts unless you can prove you own them. Also know to what extent your insurance (including flood insurance) will replace damaged property. While some policies will cover the replacement cost of damaged property, some may only cover part of the damage cost. Also know what your deductible is.

  1. Blog or Social Networking Profile

Social networking sites such as myspace were great after Katrina. Friends could find out where other friends had evacuated to simply by reading each others’ myspaces.

  1. Generator and Gas

A generator can power many things, including home computers! Check with your local generator supplier about any local laws about generators, how to safely and properly set one up, and how well they will work with computers. Because generators provide unstable power, a battery backup UPS and a surge protector are a must. Do not count on gas to power your generator being available in the aftermath of the storm. It’s best to have a good supply of gas as well as a few empty gas containers on hand.

Part II: Evacuating with Your PC

Like any family members or pets you may have, your PC isn’t something to leave behind if you can avoid it. While your first priority should be getting out alive, you should consider bringing your PC with you if you can room in your car. You can’t count on your destination to have good computers, high speed Internet, or any entertaining activities for that matter. Being in another place during a hurricane is stressful. Between watching your home town being walloped on CNN and The Weather Channel, the people around you as well as yourself will be tense and worried. Having a nice computer to browse the web with and play Battlefield 2 is a sure entertainer. In fact, the Internet was the only place where I could get information about my very neighborhood after the storm! Local newspaper message boards were packed with evacuees from all over my area and had plenty of information about damage to share.

Even if you can’t bring your PC, at the very least bring your hard drive with you! If your home is looted in the aftermath of the storm, the last thing you want is your personal data in someone else’s hands. Be sure your hard drive is in an anti-static bag to avoid needless damage to it.

If taking a long road trip, you should probably place some sort of padding or foaming (even a blanket will work) around your computer or hard drive to protect it from the vibrations of the car. Don’t bring your monitor unless you have an LCD and there’s room for it.

Part III: Leaving Your PC at Home

If you don’t have room for your PC in your car, don’t plan on staying with it during the storm. There are several safeguards you can take to prevent unnecessary damage to your computer:

  1. Cover any open parts of your computer case (such as fans and vents) with tape. Don’t use duct tape unless you want to risk taking paint off your case or a sticky mess.

  2. Cover your computer with as many trash bags as you need. At least 2 trash bags per computer are recommended.

  3. Consider how high your home is above sea level, the risk of flooding, and other factors. If you know your home could flood, you should put your computer on the second floor. But if you know your roof is weak and could easily blow off, don’t put it on the second floor! Find an enclosed space with no windows (such as a closet) as close to the center of your home as possible. If your computer case has a side window, make sure it’s facing towards the ground or against a wall. If you can, place other objects around your computer to offer it additonal protection from blowing rain and flying debris.

Part IV: When the Worst Happens

In the event your PC becomes damaged during the storm, don’t fret. If the damage is from a fallen tree or a piece of flying debri, there is nothing you can do. If your computer becomes flooded, however, there are steps you can take to recover it. Below is a basic guide on how to recover a flooded computer.

  1. Do not turn on the computer! Make sure it is unplugged! While you may be anxious to see if your computer can run, don’t do it if you know it’s been exposed to water. You’ll just end up causing more damage if you do. Remember to keep your computer unplugged.

  2. Remove components that work. If you can see a water line in your computer, take out all the components above it and put them in a safe place.

  3. Let your computer dry. Let your computer dry for a week or so. One drop of water in a running computer could mean disaster.

  4. Remove the CMOS battery and other parts.

  5. Use a solution of 90% alcohol or more to wash the various components of your computer, including connectors. If necessary, use a paint brush to remove stubbon crud.

  6. Let your computer dry completely.

If the above doesn’t work or you have data you can’t risk losing on your hard drive, consider professional computer recovery. Do not plan on salvaging the power supply, CMOS battery, the hard drive, optical drives, or any fans if they have been flooded. Also remember to take pictures of any damage to your computer before you attempt to fix it for insurance purposes.

Hopefully this guide will help people save their computers from hurricane related damage. A computer is a very useful tool that should be part of any good disaster supply kit. Trust me when I say it’s an important thing to have around. However, remember a computer is only a material possession. Like all material objects, they can be replaced. Human and animal life, however, cannot. Use good judgement when deciding whether or not to take your computer with you and while repairing it if it damaged.

Disclaimer: In no way is the author responsible for any actions you may take to save your computer from a hurricane or fix it after flooding. Any actions you choose regarding hurricanes and computers are taken at your own risk. For the sake of all, please use common sense during any natural disaster.

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