Patriot Memory Cards

Patriot Memory Cards
Patriot Signature 8 GB 266x CompactFlash Memory CardPatriot memory cards combine massive storage capacity, blazing data transfer rates and ironclad security in a memory card no bigger than a postage stamp. With an excellent price-to-performance value, Pariot flash cards are ideal expansion option for the smallest of devices including digital cameras, digital camcorders, PDAs, cell phones, smartphones, MP3 players, and more.

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  Compact Flash Card Size
  Patriot Signature 32 GB 266x CompactFlash Memory Card PSF32G266CF: $89.00
  Patriot Signature 16 GB 266x CompactFlash Memory Card PSF16G266CF: $46.00
Patriot Signature 8 GB 266x CompactFlash Memory Card PSF8G266CF: $28.00
  Patriot Signature 4 GB 266x CompactFlash Memory Card PSF4G266CF: $23.00
   
  SD Flash Card Size (SDHC)
Please verify that your device such as cellular phone or digital camera supports SDHC cards. SDHC cards are not compatible with standard SD host devices and card readers, and will only work on SDHC host devices.
  Patriot LX Series 32 GB Class 10 SDHC Flash Memory Card PSF32GSDHC10 (Black): $99.92
  Patriot LX Series 16 GB Class 10 SDHC Flash Memory Card PSF16GSDHC10 (Black): $44.49
  Patriot LX Series 8 GB Class 10 SDHC Flash Memory Card PSF8GSDHC10 (Black): $26.99
  16GB Patriot SDHC Memory Card For KODAK HD Pocket Camcorder Zi6. High Speed, class 6 with life time warranty. $46.79
   

Speeds

SecureDigital
There are different speeds of SD card available. The official unit of measurement is the Speed Class Rating; an older unit of measurement is the rating.

Speed Class Rating

The Speed Class Rating is the official unit of speed measurement for SD Cards, defined by the SD Association. It is equal to 8 Mbit/s, and it measures the minimum write speeds based on "the best fragmented state where no memory unit is occupied

The following are the ratings of some currently available cards:

  • Class 2: 16 Mbit/s (2 MB/s)
  • Class 4: 32 Mbit/s (4 MB/s)
  • Class 6: 48 Mbit/s (6 MB/s)
  • Class 10: 80 Mbit/s (10 MB/s)
Even though the class ratings are defined by a governing body, like speed ratings, class speed ratings are quoted by the manufacturers but unverified by any independent evaluation process.

Important differences between the Speed Class and the traditional CD-ROM drive speed measurement ("" speed ratings) are:

  • 1. the ability of the host device to query the SD card for the speed class and determine the best location to store data that meets the performance required
  • 2. class speed defines the minimum transfer speed.
  • Since the class rating is readable by devices, they can issue a warning to the user if the inserted card's reported rating falls below the application's minimum requirement.
On 21 May 2009, Panasonic announced new class 10 SDHC cards, claiming that this new class is "part of SD Card Specification Ver.3.0". Toshiba also announced cards based on the new 3.0 spec As of December 2009, the SD Association's Web site does not include information on this new class or new specification.

rating

The rating is a unit of measurement equal to 1.2 Mbit/s. It is derived from the standard CD-ROM drive speed of 1.2 Mbit/s. Basic cards transfer data up to six times (6) the data rate of the standard CD-ROM speed (7.2 Mbit/s vs 1.2 Mbit/s). The 2.0 specification defines speeds up to 200, but unlike the class rating system, does not mandate that x-ratings measure the card's sustained write-speed. For most cards, the maximum read speed is typical faster than its maximum write speed, leading some manufacturers to use read-speed as the -rating measurement. Other vendors, such as (Kingston, use write-speed.[ This table lists common ratings and minimum transfer rates.
 
Rating Write Speed
(Mbit/s)
SD Class
6 7.2  
10 12.0  
13 16.0 2
26 32.0 4
32 38.4 5
40 48.0 6
66 80.0 10
100 120.0 15
133 160.0 20
150 180.0 22
200 240.0 30
266 320.0 40
300 360.0 45

 

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