Card Access Times

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Created by leigerleiger on 30 Jun 2009 04:17
Updated by leigerleiger on 17 Mar 2010 04:09

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This is a page I made a while back to store my microSD speed stuff. When I added the personal pages to the site I just added this to the same category as a test to make sure everything was working properly.

If you want to find your own microSD's speed, use app:speed-tester-for-libfat-cf-bench to do that.

Transcend 8GB µSDHC Class 6

Tested on June 30, 2009

Sequential (512 B)
  max: 555 µs ; avg: 291 µs
Sequential (4 KiB)
  max: 2461 µs ; avg: 2436 µs
Sequential (16 KiB)
  max: 10040 µs ; avg: 9871 µs
Random (512 B)
  max: 716 µs ; avg: 646 µs
Random (4 KiB)
  max: 2645 µs ; avg: 2551 µs
Random (16 KiB)
  max: 10182 µs ; avg: 10010 µs

If you've tested your card recently, feel free to post your own results and compare.


Replies to Card Access Times

rating: +2+x

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24 Dec 2009 02:26

There is some very useful/interesting information here, so I'm making a copy of it in this post:

SanDisk 16GB µSDHC

APlusAPlus 20 Jul 2009, 03:29 GMT+0930

Sequential (512 B)
  max: 663 µs ; avg: 346 µs
Sequential (4 KiB)
  max: 2879 µs ; avg: 2772 µs
Sequential (16 KiB)
  max: 11339 µs ; avg: 11146 µs
Random (512 B)
  max: 726 µs ; avg: 690 µs
Random (4 KiB)
  max: 2877 µs ; avg: 2783 µs
Random (16 KiB)
  max: 11396 µs ; avg: 11188 µs

Some info

leigerleiger 23 Jul 2009, 02:02 GMT+0930

Class 2 = 2 MB/s write speed
Class 4 = 4 MB/s write speed
Class 6 = 6 MB/s write speed

Speed of reading data seems to depend on the card manufacturer, country it was made in, etc.

Transcend 4GB Class 6

psxlover (guest) 4 Oct 2009, 20:14 GMT+1030

Sequential (512 B)
  max: 432 µs ; avg: 232 µs
Sequential (4 KiB)
  max: 1836 µs ; avg: 1824 µs
Sequential (16 KiB)
  max: 7323 µs ; avg: 7298 µs
Random (512 B)
  max: 495 µs ; avg: 476 µs
Random (4 KiB)
  max: 1901 µs ; avg: 1878 µs
Random (16 KiB)
  max: 7374 µs ; avg: 7346 µs

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NDS lite (Jet Black) FW v5 | CycloDS Evo (Black) HW 1.1 | Transcend 8GB µSDHC Class 6 | EzFlash V 3in1+ (Black)
Nintendo 3DS: Message me if you want to exchange FC. Lost your game save files? You might want to try one of these.

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