SDHC Classes?

Zaf · 14 Jun 2010 at 20:50

Does it really matter what class memory card you use in a mobile? Is Class 2 more than enough or should I get a Class 6.

I've got a HTC Desire was looking at 32gb but they are £80+ so going with 16gb but not sure if a Class 2 will do or not

What's everyone else got?

macster · 14 Jun 2010 at 20:52

its a speed thing:
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)

deadite66 · 14 Jun 2010 at 21:04

though the classes aren't always accurate, i have a class2 that does 4.6MB/s.

brummie · 14 Jun 2010 at 21:55

deadite66 said:
though the classes aren't always accurate, i have a class2 that does 4.6MB/s.

yep my class 6 has a constant over 10mb/s when used on the computer but maybe its restricted in the phone? i dont know

IamMed · 14 Jun 2010 at 22:06

Class 2,4 etc is the minimum speeds it should do, not the maximum

Richiev4 · 14 Jun 2010 at 22:08

I have a class 4 in my hero, It's plenty fast enough.

Richie · 14 Jun 2010 at 22:13

I suspect the speeds will become more noticeable now Android has A2SD.... If you dont use A2SD then speed is not an issue....

chaparral · 14 Jun 2010 at 22:52

Richie said:
.... If you dont use A2SD then speed is not an issue....

Many people also transfter music & movies to there mobiles from PC..

Richie · 14 Jun 2010 at 22:59

I gather that but it doesnt take much longer to transfer files on a Class 4 compared to a Class 6, but hey, if someone has money to burn for something as non-important as a faster SD card for casual use then go for it.

chaparral · 14 Jun 2010 at 23:06

Zaf said:
so going with 16gb but not sure if a Class 2 will do or not

Don't seem to be much difference in price between class 2 & 4 16GB cards...

Unless am looking at the wrong places..

Jabbs · 15 Jun 2010 at 08:10

I picked up a 16gb class 2 and notice no difference in performance from the class 6 8gb card i had in before, its really only the transfer speed where you notice it.

spaceman · 15 Jun 2010 at 09:11

i'm using a class 2 16gb card with apps2sd and dont notice any difference to when the apps were stored on the phone speed wise.

the only time it's slow is when i'm copying large files over to the card from my pc

osc89er · 15 Jun 2010 at 09:41

Some of the custom roms out there put a swap partition on the memory card as well as the apps2sd and Dalvik cache. I believe some of the user comments were that apps launched and ran noticeably faster on class 6 cards when they did that.

shahpor · 15 Jun 2010 at 17:56

Is there a way to test the speed other than connecting it to a pc?

Zaf · 15 Jun 2010 at 18:09

I'm not to bothered about the Write speed transfering files onto the card etc It's the read speed I was concerned about does anyone know how much it differ's by Class?

Even the 16gb Class 6 are around £50+

BoomAM · 15 Jun 2010 at 20:03

No idea what mine is, nor can i find out from the product code:
SANDISK SDSDQ-016G-E11M Micro SDHC memory card

Zaf · 15 Jun 2010 at 20:37

BoomAM said:
No idea what mine is, nor can i find out from the product code:
SANDISK SDSDQ-016G-E11M Micro SDHC memory card

Class 2 from a quick google. It's the number written on the card itself

spaceman · 15 Jun 2010 at 20:39

my class 2 card is write 3MB/s, read 14MB/s according to the "SD card speed tester" app on the market.

dunno if any of my apps were using the card at the same time or if its accurate

BoomAM · 15 Jun 2010 at 21:51

spaceman said:
my class 2 card is write 3MB/s, read 14MB/s according to the "SD card speed tester" app on the market.

Comes up with 2.0Mb Write, 14Mb Read.
Should be fine that surely?

spaceman · 15 Jun 2010 at 22:29

yep the speed is fine for apps/mp3/divx.

people with faster cards should try that app, to see if the desire can keep up with higher class cards.