Feb 10 2009, 05:20 PM
Added on February 10, 2009, 5:22 pm
QUOTE(InYourDreamz @ Feb 10 2009, 03:42 PM)
Memory buying Guide: Speed Class
SDHC cards have SD Speed Class Ratings defined by the SD Association. “These new speeds are available in a new specification defining the minimum data transfer speeds for both SD/SDHC memory cards and SD/SDHC host products. This enhancement is easily recognized by three levels of Speed Class, class 2, 4 and 6. Speed Class 2 guarantees a MINIMUM transfer speed of 2 mega bytes per second (MB/s), Speed Class 4 guarantees a minimum transfer speed of 4 MB/s and Speed Class 6 guarantees a minimum transfer speed of 6 MB/s.”
It’s very important to notice that the speed class rating specifies a minimum transfer speed. So instead of showing the typical maximum, which in many cases is never reached, this system shows a guaranteed minimum. In many cases the system will easily surpass this minimum, with a transfer speed that’s much higher. A good example of this is this benchmark test done here with the Nokia 5800 XpressMusic. I used a class 2 16GB microSDHC card, which guarantees a minimum transfer speed of 4 MB/s, but in reality what we got was actually almost twice that at 7.4 Mb/s. Using a card reader we could even see a dramatically higher transfer speed of 19.7 MB/s!
I’ve also been seeing some people who got a “class 2” 16 GB card and wanted to exchange it for the class 4 model, claiming that the class 2 card was “slower and that it would “slow things down.” This is definitely not true. Checking with the same test here, even a class 2 card is enough for even the fastest of Nseries devices; the N96 and 5800 XpressMusic. A card reader is our was able to squeeze 19.7 MB/s out of a class, which certainly more than any Nseries currently on the market, including the N96 and 5800 XpressMusic. Below you can see how much juice we were able to squeeze out of “mere” class 2 card:
A golden rule applies when buying memory cards for your Nseries device: cheaper class 2 memory cards are more than enough for current Nseries device, even the newer devices with enhanced transfer speeds. Things might change quickly though with future devices…
-------------------------------------------------------------------------------------------
Taken from
http://www.thenokiaguide.com/my_weblog/200...peed-class.html
Noted will put this on FP thanksSDHC cards have SD Speed Class Ratings defined by the SD Association. “These new speeds are available in a new specification defining the minimum data transfer speeds for both SD/SDHC memory cards and SD/SDHC host products. This enhancement is easily recognized by three levels of Speed Class, class 2, 4 and 6. Speed Class 2 guarantees a MINIMUM transfer speed of 2 mega bytes per second (MB/s), Speed Class 4 guarantees a minimum transfer speed of 4 MB/s and Speed Class 6 guarantees a minimum transfer speed of 6 MB/s.”
It’s very important to notice that the speed class rating specifies a minimum transfer speed. So instead of showing the typical maximum, which in many cases is never reached, this system shows a guaranteed minimum. In many cases the system will easily surpass this minimum, with a transfer speed that’s much higher. A good example of this is this benchmark test done here with the Nokia 5800 XpressMusic. I used a class 2 16GB microSDHC card, which guarantees a minimum transfer speed of 4 MB/s, but in reality what we got was actually almost twice that at 7.4 Mb/s. Using a card reader we could even see a dramatically higher transfer speed of 19.7 MB/s!
I’ve also been seeing some people who got a “class 2” 16 GB card and wanted to exchange it for the class 4 model, claiming that the class 2 card was “slower and that it would “slow things down.” This is definitely not true. Checking with the same test here, even a class 2 card is enough for even the fastest of Nseries devices; the N96 and 5800 XpressMusic. A card reader is our was able to squeeze 19.7 MB/s out of a class, which certainly more than any Nseries currently on the market, including the N96 and 5800 XpressMusic. Below you can see how much juice we were able to squeeze out of “mere” class 2 card:
A golden rule applies when buying memory cards for your Nseries device: cheaper class 2 memory cards are more than enough for current Nseries device, even the newer devices with enhanced transfer speeds. Things might change quickly though with future devices…
-------------------------------------------------------------------------------------------
Taken from
http://www.thenokiaguide.com/my_weblog/200...peed-class.html
This post has been edited by aspire2oo6: Feb 10 2009, 05:22 PM
Quote
Just finish reading from V7 
0.0198sec
0.18
7 queries
GZIP Disabled