Whats the difference between a class 2 and 10 card? Both with same read/write speeds

[eddywatson]

Hello

I have just seen a Sandisk SD card that is 16gig and was a class 2, it had 15mb/s read speed and 9mb/s write speed. and it cost £30

Then I seen an Luxor (class 10 I think it was) 16gig card again with 15mb/s read and 9mb/s write speed and it cost £80

If the read and write speed are the same... why is there a huge gap in price? or whats the difference between the 2?

thanks

 

[shotokan101]

Hello

I have just seen a Sandisk SD card that is 16gig and was a class 2, it had 15mb/s read speed and 9mb/s write speed. and it cost £30

Then I seen an Luxor (class 10 I think it was) 16gig card again with 15mb/s read and 9mb/s write speed and it cost £80

If the read and write speed are the same... why is there a huge gap in price? or whats the difference between the 2?

thanks

Sounds odd - can you post links to the two cards ?

Jim

 

[pmcgsmurf]

Class 10 is 10 MByte/s write speed.

Class 2 I would have thought would be 2 MByte/s.

Lets check google.........

Secure Digital - Wikipedia, the free encyclopedia

So there must be a mistake whereever you have looked at the listing.

 

[eddywatson]

I was in the new Currys/PC World this afternoon looking at 3DTV's lol and I seen them on the shelf. Then I asked the geeky bloke in the shop what the difference was and he said nothing.... :S

 

[Deleted member 27989]

It is all about guarantee, I bet one is quoting peak transfer rates and the other is quoting sustained. Oldest trick in the book. The class system works such that speeds must be no less than guaranteed.

Me, I prefer uhs-1 cards

 

[mucca_D]

I was in the new Currys/PC World this afternoon :S

Well that will be your first mistake


As for speed, defo post the links as they should not be the same.



.

 

[nheather]

I suspect it is a cut and paste error (or ignorance) by the retailler.

Perhaps he didn't have info for the Class 2 so just copied it over.

The other thing to be careful of when transfer speeds referenced is whether they are MBps or Mbps - 8 times different.

(note that at 15mbps it will take 8.9 minutes to transfer 1 byte of data - sorry, being anal)

Cheers,

Nigel

 

[shotokan101]

I suspect it is a cut and paste error (or ignorance) by the retailler.

Perhaps he didn't have info for the Class 2 so just copied it over.

The other thing to be careful of when transfer speeds referenced is whether they are MBps or Mbps - 8 times different.

(note that at 15mbps it will take 8.9 minutes to transfer 1 byte of data - sorry, being anal)

Cheers,

Nigel

"Oh NO It Won't" - I guess you've missed a word out before the "byte"

Jim

 

[boltoa]

"Oh NO It Won't" - I guess you've missed a word out before the "byte"

Jim

Oh yes it will.

I suspect he was referring to the "m" as in milli- and the "M" as in Mega-. So 15 thousandths of a bit per second is a bit slow. About a minute per bit.

Misinterpretation for comedy effect ftw