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Old 05-22-2009, 09:15   #1
ned7077
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Default How to spot a fake SDHC card

I thought it might be good to post some links to information on how to spot a fake flash card and some fake flash information:

Fake Flash wiki:
http://www.overclockers.com.au/wiki/Fake_Memory_Cards

Fake Flash news blogs:
http://fakeflashnews.wordpress.com/
http://fakeflashnews.totalh.com/

Tool to detect if your flash card is a fake (Windows XP/Vista):
http://www.heise.de/ct/Redaktion/bo/...2testw_1.4.zip

Instructions can be found here.

If anyone else has easier detection methods, known fake sellers, or more links please post them.

Last edited by ned7077; 05-22-2009 at 09:20..
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Old 05-22-2009, 11:15   #2
ned7077
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I have tested the flash verification tool for a 16GB Sandisk Ultra II SDHC card I bought from newegg.com. I tested it in my D2 since I don't have a card reader with me at the moment. Below is the output from the program:

Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 4.65 MByte/s
Reading speed: 4.60 MByte/s
H2testw v1.4


A couple of tips for the flash verification tool usage. For a complete verification of the card, the card needs to be formatted and blank. The tool creates 1GB files and fills the card and then reads it back. If the card is full already you can try a verify only but if your suspecting your card is a fake I would suggest doing a write and verify. Also this program is writing and reading the entire capacity of your card. On a large card this can take a long time. The good thing is it estimates how much time is left.

Last edited by ned7077; 05-26-2009 at 13:47..
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Old 05-27-2009, 02:26   #3
lh_
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You need a decent card reader to test card's throughput. D2 is a pretty poor substitute. I clocked a 32gb class 6 transcend at W: 10.3 MB/s, R: 18.x MB/s.

You can find a benchmarking utility h2benchw at heise.de as well.
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Old 05-29-2009, 16:24   #4
ned7077
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The H2testw v1.4 tool is specifically testing for verification that the stated capacity is the true read and write capacity. As long as my D2 can play the audio from my SDHC card I don't care too much how slow/fast it is (within reason of course).
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Old 02-24-2010, 15:07   #5
ned7077
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I found this article on the industry of fake memory cards.
http://www.bunniestudios.com/blog/?p=918
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Old 03-27-2011, 03:49   #6
Ashe
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I recently bought a fake Kingston SD4 32GB card off of eBay where it was sold as being genuine.

It quickly became clear since I had skips in my D2 and on certain songs the player hanged itself. After a format on my Macbook obviously things went downhill. It corrupted each time after I removed it out of my D2 and wanted to put new music on it. Connecting the D2 with the card inserted on Windows 7 didn't allow me to format it etc.

Missing barcodes on the packaging, no LK, no "identification box" on the back of the package (the right box) and a white Lock slider instead of a yellow all made it suspicious. The eBay seller is positive he will refund my money but we'll see.

Speeds were horrible as well: below 2MB/s.

Anyway, if something sounds too good to be true, it typically is. :-)
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Old 12-06-2012, 20:15   #7
CoCoBar
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I think Kingston SD4 is not a good choice. I bought a 16GB card three weeks ago. It does not work. Hope that no body supports Kingston.
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