Memory card speed is the card's performance with regard to how quickly data can be transferred to or from it. The card speed is often stated in 'Times' ratings i.e. 12X, 40X etc (just as the speed of recordable CD's and DVD's is measured), and sometimes more specifically in megabytes per second (Mb/s). By today's measure, sub 20X represents a standard speed, 20X to 40X is mid-high speed and over 40X is high speed. The chart below shows the relationship between the two figures.
8X = 1.2 Mb/sec
12X = 1.8 Mb/sec
20X = 3.0 Mb/sec
25X = 3.8 Mb/sec
30X = 4.5 Mb/sec
40X = 6.0 Mb/sec
60X = 9.0 Mb/sec
66X = 10.0 Mb/sec
80X = 12.0 Mb/sec
90X = 15.0 Mb/sec
133X = 20.0 Mb/sec
In a few short years since the launch of the first 4Mb flash memory card, the number of flash memory cards available for digital cameras and other devices has exploded with a number of different formats and speeds of memory card. It's no wonder the average person is totally baffled by this plethora of memory cards.
Not only are there different shapes (the format) and sizes such as Secure Digital (SD) Compact Flash, Memory Stick etc, but also different speed ratings.
Why do we need different or higher speeds cards?
This is mainly due to the advancement of our digital devices, especially digital cameras, camcorders and music devices. As manufacturers develop higher and higher spec devices (i.e. higher resolution cameras and more intense multi-media functions), they are creating increasingly larger amounts information to store pictures, movies, music and so on. This in turn takes longer to record onto the memory card. For example if you have ever used a high megapixel camera with a standard speed card you may have noticed the time lag between pressing the shutter button and being able to take the next picture. This lag or delay, in most cases is caused by a slow write speed, similarly copying your photos to your PC could take time too and is caused by a slow read speed.
So who really needs high-speed memory cards?
Professional photographers and enthusiasts using professional grade cameras such as digital SLR's should use high-speed memory cards of at least 40X speed. If you own a camera with a megapixel rate above three million pixels, you will certainly benefit from a card with a higher speed rating. If you're like most of us using a compact camera under 3 million pixels, you'll get great performance from standard cards with 12X or more.
Those using digital camcorders and devices recording MP3 music or video will also benefit from higher speed cards. It used to be the case where very few people would actually benefit from very high-speed cards, typically only professionals who used expensive, specialized products benefited, but it's fast becoming a requirement on many of the latest PDA's, Cameras, phones and other mobile devices to make use of the extra speed made available by high speed cards.
People using high speed memory cards with equipment that has been on the market a while may not notice any difference in performance, but this has more to do with the limitations of the device than the flash card itself. This is because not only does your memory card have a maximum speed rating, but your camera or mobile phone will also have its own speed rating. When these products are combined, they'll work at the "slowest common denominator" e.g. if you use a 12X flash card in a camera with a designed for a maximum of 8X speed, you'll be transferring data at the slower 8X speed.
You should always check the capacity of your device before splashing out on mega fast cards, but determining the speed compatibility of your device can be tricky. Most manuals just don't tell you what speed of flash card you should use, now that would be far too easy, but they do tell you to buy their brand, which isn't much help! So a general rule of thumb, if your camera is less than three megapixels the speed rating of the flash card doesn't matter much. Most modern cameras have the ability to support far higher speeds than the cards available to purchase today, therefore, if speed is of importance, go for a faster card. Most mobile phones, PDA's and Satellite Navigators are fine with standard speed cards although some newer models will benefit from higher speed cards but not generally over 60X speed.
The internet is a good resource to find out about your device, but in our experience the device retailer and forums are not always the best source of information, you would be better to seek information from the manufacture's website or from dependable review sites.
If you are in any doubt about the card you require or even desire, you can always call us at Mouse2house.co.uk on 0845 257 2088 and we will do our best to guide you in the right direction.
If you are in any doubt about the card you require or even desire, you can always call us at Mouse2house.co.uk on 0845 257 2088 and we will do our best to guide you in the right direction.
Tampilkan postingan dengan label DVD. Tampilkan semua postingan
Tampilkan postingan dengan label DVD. Tampilkan semua postingan
Kamis, 09 April 2009
Rabu, 08 April 2009
Pen Drive
A Pen Drive is a removable storage device that plugs into a computer's USB port. Small enough to carry on a key ring, Pen Drives are great for transferring photos, music, documents and any other data from one computer to another. Different manufacturers over the years have named their Pen Drives with many different names causing constant confusion.
As a result of this the Pen Drive can also be known as Pocket Drive, Thumb Drive, Jump Drive, USB Flash Drive, USB Flash Memory Drive, USB Key Drive, USB Memory Key and USB Memory Stick among many others!
Although none of these names are either correct or incorrect, one of the names cause a huge amount of confusion for people, this is when someone referring to a Pen Drive, uses the term "Memory Stick". This is because "Memory Stick" is a Sony trademark and refers to a type of memory card used in Sony's electronic devices, it is therefore a completely different product, which will not plug directly into your computer's USB port!
Pen Drives were invented by IBM in 1988 as a replacement to Floppy Disks but were never patented by them, M-Systems who were later contracted in by IBM to manufacture Pen Drives actually own the patent. So think of a Pen Drive as a modern day floppy disk. The main difference being that a floppy disk contains moving parts which can make the data stored on it vulnerable, a Pen Drive is solid state meaning there are no moving parts inside, making it resilient to dust and everyday magnetic fields and so a safer storage option. Also Pen Drives can hold much, much more data than the floppy disk.
Once connected to a computer's USB port the Pen Drive appears in Windows as a "Removable Drive" alongside your C Drive, CD ROM Drive etc. You can simply drag and drop photos, music, documents and any other type of data on to the "Removable Drive" just as would with any other folder on your computer (no complex recording like CD or DVD is required). The Pen Drive can then be removed (see Safe Removal of Pen Drive below) from the computer and plugged into another computer's USB port giving you access to the information you copied to the Pen Drive.
The compact size, robust nature and low cost of the Pen Drive has made it a big hit and an indispensible tool for many. It is ideal for transporting personal, or work data from one location to another, i.e. from home to school or office, or for carrying around data that someone may want to access in a variety of places. An insurance company in the US loads customer bio data and policy details on a tiny Pen Drive and advises policy holders to wear it with a neck strap in case of emergencies, another company is doing the same with policy holders who go Sking. Another company videos their conference and records it onto the Pen Drive so that the delegates can refer to it in future. Pen Drives can also be used to back up your important documents.
If you would like to know more about Pen Drives please visit our website or call us on 0845 257 2088 (9am-5pm Mon-Fri) and we will do our best to assist you. Mouse2House.co.uk supply thousands of Pen Drives to Schools, Hospitals, Businesses, Government agencies and of course private individuals. We are also able to personalise Pen Drives with logos and messages for commercial or fund raising events, minimum order quantity applies to the logo service.
As a result of this the Pen Drive can also be known as Pocket Drive, Thumb Drive, Jump Drive, USB Flash Drive, USB Flash Memory Drive, USB Key Drive, USB Memory Key and USB Memory Stick among many others!
Although none of these names are either correct or incorrect, one of the names cause a huge amount of confusion for people, this is when someone referring to a Pen Drive, uses the term "Memory Stick". This is because "Memory Stick" is a Sony trademark and refers to a type of memory card used in Sony's electronic devices, it is therefore a completely different product, which will not plug directly into your computer's USB port!
Pen Drives were invented by IBM in 1988 as a replacement to Floppy Disks but were never patented by them, M-Systems who were later contracted in by IBM to manufacture Pen Drives actually own the patent. So think of a Pen Drive as a modern day floppy disk. The main difference being that a floppy disk contains moving parts which can make the data stored on it vulnerable, a Pen Drive is solid state meaning there are no moving parts inside, making it resilient to dust and everyday magnetic fields and so a safer storage option. Also Pen Drives can hold much, much more data than the floppy disk.
Once connected to a computer's USB port the Pen Drive appears in Windows as a "Removable Drive" alongside your C Drive, CD ROM Drive etc. You can simply drag and drop photos, music, documents and any other type of data on to the "Removable Drive" just as would with any other folder on your computer (no complex recording like CD or DVD is required). The Pen Drive can then be removed (see Safe Removal of Pen Drive below) from the computer and plugged into another computer's USB port giving you access to the information you copied to the Pen Drive.
The compact size, robust nature and low cost of the Pen Drive has made it a big hit and an indispensible tool for many. It is ideal for transporting personal, or work data from one location to another, i.e. from home to school or office, or for carrying around data that someone may want to access in a variety of places. An insurance company in the US loads customer bio data and policy details on a tiny Pen Drive and advises policy holders to wear it with a neck strap in case of emergencies, another company is doing the same with policy holders who go Sking. Another company videos their conference and records it onto the Pen Drive so that the delegates can refer to it in future. Pen Drives can also be used to back up your important documents.
If you would like to know more about Pen Drives please visit our website or call us on 0845 257 2088 (9am-5pm Mon-Fri) and we will do our best to assist you. Mouse2House.co.uk supply thousands of Pen Drives to Schools, Hospitals, Businesses, Government agencies and of course private individuals. We are also able to personalise Pen Drives with logos and messages for commercial or fund raising events, minimum order quantity applies to the logo service.
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