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Accessories class 6 memory card

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gurmukhp

Newbie
Hi there,

I have a class 6 sandisk card in my desire but am wondering if it is actually as fast as it should be. Videos are laggy amongst other things.

I have downloaded a SD card speed test from the market. The results were 13mb/s to write(quite good I thought) but the read speed was only 5mbps/s.

Anyone know if those values are expected?

Thx!
 
Authoritative read speed ratings are hard to come by. Not even the SDcard organisation lists that information, and googling brings forth a number of different "theoretical" numbers (all of them non-authoritative).

Sorry...
 
The other day I bought a Kingston Class 4 card. I just came across this thread again, and figured I'd test my card (with SD Card Speed Test), which was rather disappointing!

  • Read: 3Mb/s
  • Write: 2Mb/s
  • Rating: Class 2
Several runs (even with everything else shut down) confirm the result. WTF?! :confused:
 
There could be many reasons. Is the Kingston card legit? You might be able to check that on their website using the serial number?
 
gurmukhp said:
There could be many reasons. Is the Kingston card legit? You might be able to check that on their website using the serial number?
Click to expand...
It should be legit, I bought the card in a main street store with full packaging. Where do I find the serial number, and do you know where exactly on their site I can check that (or did you simply mean, contact their support)?
 
I've got a Transcend 8 GB class 6 card which I tested with the app mentioned above: -

Read speed - 12 MB/s
Write speed - 13 MB/s

I wouldn't necessarily trust results from that app though. Try programs such as HD Tune or H2testw.
 
Tunga said:
The lesson here is: buy a Sandisk.
Click to expand...
All the shops around here sell unmarked Sandisk items, which on very close inspection are Class 2. I've not seen a single faster Sandisk item. (I prefer a real shop over paying a cheaper price on eBay but then 3x that amount on shipping.)

fried said:
I wouldn't necessarily trust results from that app though. Try programs such as HD Tune or H2testw.
Click to expand...
Good point. Except, the only micro sdcard slot I own is in my Desire. :o I don't suppose mounting it via USB(2) is a very good idea for this type of testing, is it?

Thought: I hope it's not the Desire (hardware/software) that's limiting the card! :confused:
 
KlaymenDK said:
Good point. Except, the only micro sdcard slot I own is in my Desire. :o I don't suppose mounting it via USB(2) is a very good idea for this type of testing, is it?
Click to expand...

In theory it should be the same all the built in card reader connect internally to the USB bus. So unless the desire is being a bottleneck the results should be very similar.
 
H2testw v1.4 said:
Warning: Only 5970 of 7327 MByte tested.
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 2.05 MByte/s
Reading speed: 3.16 MByte/s
Click to expand...
All my tests confirm it: My card is not fast enough to earn the Class 4 rating printed on it. I hope the store will take it back. maybe I should (also) contact Kingston directly.
 

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I used the complaint form at Kingston's web site the day before yesterday, and have yet to receive even an acknowledgement. :(

I'm taking the card back to the shop this afternoon.
 
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