SD Card Benchmarks

[jdb]

The card goes a lot faster than that for block reads...

Note that there are two limiting factors to the top read speed of a suitably fast SD card:

- The original SD bus speed (HS mode) maxes out at about 21MB/s (minus a bit of overhead).
- The USB2.0 throughput on most hardware is limited to less than 480Mbps for a single device bulk endpoint (typical 25-30MB/s)

I have a USB3.0 card reader that supports all the UHS-I high throughput modes and the NOOBS card can do 45-ish MB/s easily.

I will spin up crystaldiskmark this evening and give it a go.

[lingon]

8GB Raspberry PI NOOBS card:

MMCTR08GUBCH-ML
D HTIA02GB 343
Made in KOREA

Benchmarks looking really good, beating the sandisk !

Thanks for sharing this result! I agree that it looks like a very good card for random writes.

[Richard-TX]

Toshiba Exceria (Red Label)

[Richard-TX]

exceria green label (32gb)

[jdb]

NOOBS 8GB SD card w/ USB3.0 reader

MMCTR08GUBCH-ML

OK so sequential read isn't as big as I thought - that'll teach me to trust win7 copy dialogue boxes

Noobs8GB.png (43.54 KiB) Viewed 28221 times

Kingston Class 10 card

Kingson class 10.png (43.26 KiB) Viewed 28221 times

Wow. That's a lot slower than I expected.

[blachanc]

welcome to the club... (re your kingston class 10)....


Buy an 8GB NOOBS SD card for £5

in the comment section:

liz on
January 10, 2014 at 11:08 am said:
Yes. (Anyone who buys a Class 10 card for their Pi just because the number 10 is higher than the number 4, deserves everything they get.)

[milhouse]

Wow. That's a lot slower than I expected.

Try reducing the size of your test data set, eg. try 50MB instead of 100MB.

I found that the same flash memory (USB3 memory stick in this case) could return good results at 50MB, even 100MB, but performance fell off a cliff when testing with a data set larger than 500MB. Maybe your Kingston card is suffering at only 100MB, though I've no idea why this should be the case (maybe an anomaly of the testing software, or it really is a poorly performing card?)

[lingon]

NOOBS 8GB SD card w/ USB3.0 reader

MMCTR08GUBCH-ML

Thanks for sharing the NOOBS card USB3.0 results as well!

[jdb]

welcome to the club... (re your kingston class 10)....


Buy an 8GB NOOBS SD card for £5

I know, I just wasn't expecting the class 10 to be *that* terrible.

Try reducing the size of your test data set, eg. try 50MB instead of 100MB.

I found that the same flash memory (USB3 memory stick in this case) could return good results at 50MB, even 100MB, but performance fell off a cliff when testing with a data set larger than 500MB. Maybe your Kingston card is suffering at only 100MB, though I've no idea why this should be the case (maybe an anomaly of the testing software, or it really is a poorly performing card?)

I repeated the test with 50MB test set size - no difference.

Edit: I knew I had seen these cards do faster than that: My desktop PC only has 2x USB3.0 ports and I plugged the reader into the wrong one

It appears there are two types of NOOBS card in the wild. The first is the class 4 variant but the version on sale right now is the class 6 variant.

Noobs class 6 8GB.png (44.8 KiB) Viewed 28145 times

Older noobs 8GB.png (48.43 KiB) Viewed 28145 times

[StevenP]

Here are the results from my SanDisk Extreme 8GB Class 10, 45MB/s, (SDSDX-008G-X46), taken over a USB2 port on a Windows 7 PC:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 19.195 MB/s
Sequential Write : 19.135 MB/s
Random Read 512KB : 18.952 MB/s
Random Write 512KB : 14.892 MB/s
Random Read 4KB (QD=1) : 4.089 MB/s [ 998.4 IOPS]
Random Write 4KB (QD=1) : 1.590 MB/s [ 388.2 IOPS]
Random Read 4KB (QD=32) : 4.642 MB/s [ 1133.3 IOPS]
Random Write 4KB (QD=32) : 1.727 MB/s [ 421.6 IOPS]

Test : 50 MB [H: 0.0% (0.0/7569.5 MB)] (x3)
Date : 2014/01/16 7:15:01
OS : Windows 7 Enterprise SP1 (x64)

SanDisk Extreme 8GB Class 10 45MB/s ( SDSDX-008G-X46 )

sandisc 8GB extreme crystalDiskMark results 16Jan2014.png (49.51 KiB) Viewed 28096 times

I believe the USB2 port I used limits the maximum speeds I can measure to 19MB/s.

The sequential write and 512kB random write speeds are 2-3 times better than the NOOB class 6 card. The 4kB random read and write speeds are similar to the NOOBS.

So I think I prefer this card to the NOOBS class 6 because of the faster large file write speeds, everything else being similar. It certainly performs very well in XBMC usage. It cost me 11 Euro from amazon.de.

Cheers,
StevenP

[jdb]

Here are the results from my SanDisk Extreme 8GB Class 10, 45MB/s, (SDSDX-008G-X46), taken over a USB2 port on a Windows 7 PC:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 19.195 MB/s
Sequential Write : 19.135 MB/s
Random Read 512KB : 18.952 MB/s
Random Write 512KB : 14.892 MB/s
Random Read 4KB (QD=1) : 4.089 MB/s [ 998.4 IOPS]
Random Write 4KB (QD=1) : 1.590 MB/s [ 388.2 IOPS]
Random Read 4KB (QD=32) : 4.642 MB/s [ 1133.3 IOPS]
Random Write 4KB (QD=32) : 1.727 MB/s [ 421.6 IOPS]

Test : 50 MB [H: 0.0% (0.0/7569.5 MB)] (x3)
Date : 2014/01/16 7:15:01
OS : Windows 7 Enterprise SP1 (x64)

I believe the USB2 port I used limits the maximum speeds I can measure to 19MB/s.

The sequential write and 512kB random write speeds are 2-3 times better than the NOOB class 6 card. The 4kB random read and write speeds are similar to the NOOBS.

So I think I prefer this card to the NOOBS class 6 because of the faster large file write speeds, everything else being similar. It certainly performs very well in XBMC usage. It cost me 11 Euro from amazon.de.

Cheers,
StevenP

Interesting: so there is a card out there that has at least some optimisation for random read/write.

But consider that the NOOBS SD card is £4 + shipping (less than 11€).

http://swag.raspberrypi.org/collections ... gb-sd-card

Note that the vast majority of workload for a typical desktop OS is random read with a few random writes - interpreting how "fast" a particular card is for an OS workload is a non-trivial estimation.

[olso4539]

I just received on of the class 4 SDHC NOOBS cards along with my raspberry pi ordered from Element 14 (Newark). The performance I'm seeing is similar to that posted above.

[lingon]

I measured one of the Raspberry PI NOOBS 8 GB uSD cards that I received today in a native SD cardreader in a HP 4330s laptop.
The cards are marked:

MMCTR08GUBCH-ML
K PSX773ZV 351
Made in PHILIPPINES

These are the CrystalDiskmark results for one of my cards:

-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 46.363 MB/s
Sequential Write : 7.573 MB/s
Random Read 512KB : 44.966 MB/s
Random Write 512KB : 5.665 MB/s
Random Read 4KB (QD=1) : 6.647 MB/s [ 1622.9 IOPS]
Random Write 4KB (QD=1) : 1.832 MB/s [ 447.4 IOPS]
Random Read 4KB (QD=32) : 9.203 MB/s [ 2246.9 IOPS]
Random Write 4KB (QD=32) : 2.545 MB/s [ 621.4 IOPS]

Test : 50 MB [D: 17.5% (1314.2/7519.0 MB)] (x5)
Date : 2014/02/12 22:10:59
OS : Windows 7 SP1 [6.1 Build 7601] (x64)

[RazzpiNoob]

This card is 10x-100x faster on small random writes than all my other SD cards and USB sticks. I chose it on a whim because the NOOBS card is a Samsung.

Samsung 16GB PLUS Micro SDHC

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 Shizuku Edition x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 19.695 MB/s
Sequential Write : 13.158 MB/s
Random Read 512KB : 18.955 MB/s
Random Write 512KB : 17.252 MB/s
Random Read 4KB (QD=1) : 4.465 MB/s [ 1090.1 IOPS]
Random Write 4KB (QD=1) : 2.732 MB/s [ 666.9 IOPS]
Random Read 4KB (QD=32) : 4.655 MB/s [ 1136.5 IOPS]
Random Write 4KB (QD=32) : 2.798 MB/s [ 683.1 IOPS]

Test : 50 MB [E: 0.0% (0.0/14.6 GB)] (x1)
Date : 2014/03/08 11:57:52
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)

[protomouse]

Samsung MB-Mpbgca/EU Micro SDHC PLUS Class 10 UHS-I (32 GB)

http://www.amazon.co.uk/dp/B00CNVT442

[davity]

Sandisk SDHC Ultra Class 10 UHS-1 8GB
SDSDU-008G-U46

http://www.amazon.es/gp/product/B00812K4V4

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 20.769 MB/s
Sequential Write : 12.630 MB/s
Random Read 512KB : 20.564 MB/s
Random Write 512KB : 2.115 MB/s
Random Read 4KB (QD=1) : 5.332 MB/s [ 1301.7 IOPS]
Random Write 4KB (QD=1) : 1.348 MB/s [ 329.1 IOPS]
Random Read 4KB (QD=32) : 5.403 MB/s [ 1319.2 IOPS]
Random Write 4KB (QD=32) : 1.090 MB/s [ 266.0 IOPS]

Test : 50 MB [F: 0.8% (63.8/7576.0 MB)] (x5)
Date : 2014/05/21 20:38:19
OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)

I'm not really sure if it's a UHS-I as Amazon show in the page. I'm amazed about the noobs SD, it's really fast!

[flytomars]

Hi all,
My first post here
I have been conducting some benchmarking of my own in the last week,
And I got to the conclusion that this is complete voodoo-
2 cards of the same serial number give completely different results,
But each card is consistent with its own results so at least it means the results are valid (even after formatting with different options - results were the same for the specific card).
I have checked 32gb class 4 (which gave good results, actually), 2gb class 2 (which were so so), 16gb class 2 (again, so so ), several 8gb class 6 (which mostly gave OK results, some more than others, sometimes the same serial gave completely different results, but all were poor with the random write), but the best of the bunch was an 8gb class 4!
I have a problem with the last test, mabe someone encountered something similar- during the last test (QD=32) my card hangs and then is not recognized - I suspect it is my USB adapter- this happened with all the faster cards (the ones which had random write higher than 1), so I dont have all results but I am attaching the 8gb class 4 results (sorry, I couldnt find the serial number - is it encoded on the card itself?)

[klmnt]

Here's the new Samsung Class 6
Samsung Electronics 8GB Micro SDHC with Adapter Upto 24MB/s Class 6 Memory Card (MB-MS08DA/AM)
http://www.amazon.com/Samsung-Electroni ... 453&sr=1-2

Seems not as good as the old class 6 Samsung cards. This one underperformes on sequential ("Upto 24MB/s" ) but 4k seems relatively decent.

[jethrogb]

Samsung 16GB PLUS UHS-1 Class 10 (MB-MPAGCA/AM) - http://www.amazon.com/dp/B00E1XI6N0

Using fio ssd-test.

Summary

Code: Select all

seq-read:      bw=10604  KB/s, iops=2650
rand-read 4K:  bw= 7410.6KB/s, iops=1852
seq-write:     bw= 2859.8KB/s, iops= 714
rand-write 4K: bw= 1343.1KB/s, iops= 335

Details

Code: Select all

seq-read: (g=0): rw=read, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=4
rand-read: (g=1): rw=randread, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=4
seq-write: (g=2): rw=write, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=4
rand-write: (g=3): rw=randwrite, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=4

seq-read: (groupid=0, jobs=1): err= 0: pid=16227
  read : io=636240KB, bw=10604KB/s, iops=2650 , runt= 60002msec
    slat (usec): min=1 , max=3047 , avg=16.16, stdev=11.77
    clat (usec): min=383 , max=13782 , avg=1487.02, stdev=240.75
     lat (usec): min=443 , max=13791 , avg=1503.93, stdev=240.21
    clat percentiles (usec):
     |  1.00th=[  836],  5.00th=[ 1128], 10.00th=[ 1272], 20.00th=[ 1400],
     | 30.00th=[ 1448], 40.00th=[ 1480], 50.00th=[ 1496], 60.00th=[ 1528],
     | 70.00th=[ 1544], 80.00th=[ 1592], 90.00th=[ 1656], 95.00th=[ 1736],
     | 99.00th=[ 2024], 99.50th=[ 2320], 99.90th=[ 3920], 99.95th=[ 4768],
     | 99.99th=[ 8032]
    bw (KB/s)  : min=10264, max=11728, per=100.00%, avg=10608.45, stdev=174.10
    lat (usec) : 500=0.02%, 750=0.14%, 1000=2.59%
    lat (msec) : 2=96.16%, 4=1.01%, 10=0.08%, 20=0.01%
  cpu          : usr=3.37%, sys=6.81%, ctx=114122, majf=0, minf=27
  IO depths    : 1=0.1%, 2=0.1%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=159060/w=0/d=0, short=r=0/w=0/d=0
rand-read: (groupid=1, jobs=1): err= 0: pid=16239
  read : io=444648KB, bw=7410.6KB/s, iops=1852 , runt= 60002msec
    slat (usec): min=2 , max=1150 , avg=16.74, stdev= 8.67
    clat (usec): min=389 , max=13172 , avg=2135.02, stdev=255.90
     lat (usec): min=398 , max=13198 , avg=2152.54, stdev=256.05
    clat percentiles (usec):
     |  1.00th=[ 1576],  5.00th=[ 1768], 10.00th=[ 1864], 20.00th=[ 1960],
     | 30.00th=[ 2024], 40.00th=[ 2096], 50.00th=[ 2160], 60.00th=[ 2192],
     | 70.00th=[ 2224], 80.00th=[ 2320], 90.00th=[ 2384], 95.00th=[ 2448],
     | 99.00th=[ 2800], 99.50th=[ 3024], 99.90th=[ 3952], 99.95th=[ 4704],
     | 99.99th=[ 8256]
    bw (KB/s)  : min= 7144, max= 7768, per=100.00%, avg=7415.26, stdev=74.49
    lat (usec) : 500=0.01%, 750=0.02%, 1000=0.02%
    lat (msec) : 2=26.03%, 4=73.83%, 10=0.09%, 20=0.01%
  cpu          : usr=3.18%, sys=5.71%, ctx=111518, majf=0, minf=27
  IO depths    : 1=0.1%, 2=0.1%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=111162/w=0/d=0, short=r=0/w=0/d=0
seq-write: (groupid=2, jobs=1): err= 0: pid=16241
  write: io=171592KB, bw=2859.8KB/s, iops=714 , runt= 60003msec
    slat (usec): min=1 , max=562 , avg=25.51, stdev=13.52
    clat (usec): min=966 , max=52638 , avg=5560.09, stdev=7613.91
     lat (usec): min=981 , max=52648 , avg=5586.63, stdev=7616.43
    clat percentiles (usec):
     |  1.00th=[ 2064],  5.00th=[ 2512], 10.00th=[ 3056], 20.00th=[ 3152],
     | 30.00th=[ 3216], 40.00th=[ 3248], 50.00th=[ 3312], 60.00th=[ 3376],
     | 70.00th=[ 3888], 80.00th=[ 3984], 90.00th=[ 4128], 95.00th=[31872],
     | 99.00th=[33024], 99.50th=[39680], 99.90th=[48384], 99.95th=[48896],
     | 99.99th=[50944]
    bw (KB/s)  : min=  354, max= 4832, per=100.00%, avg=2859.45, stdev=1329.29
    lat (usec) : 1000=0.01%
    lat (msec) : 2=0.55%, 4=81.07%, 10=9.94%, 20=1.54%, 50=6.87%
    lat (msec) : 100=0.03%
  cpu          : usr=1.72%, sys=3.21%, ctx=31547, majf=0, minf=23
  IO depths    : 1=0.1%, 2=0.1%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=0/w=42898/d=0, short=r=0/w=0/d=0
rand-write: (groupid=3, jobs=1): err= 0: pid=16247
  write: io=80712KB, bw=1343.1KB/s, iops=335 , runt= 60058msec
    slat (usec): min=4 , max=493 , avg=42.25, stdev=14.21
    clat (msec): min=3 , max=500 , avg=11.85, stdev=17.76
     lat (msec): min=3 , max=500 , avg=11.89, stdev=17.76
    clat percentiles (msec):
     |  1.00th=[    6],  5.00th=[    7], 10.00th=[    7], 20.00th=[    8],
     | 30.00th=[    9], 40.00th=[    9], 50.00th=[    9], 60.00th=[   10],
     | 70.00th=[   10], 80.00th=[   10], 90.00th=[   13], 95.00th=[   46],
     | 99.00th=[   60], 99.50th=[  100], 99.90th=[  190], 99.95th=[  388],
     | 99.99th=[  490]
    bw (KB/s)  : min=   60, max= 1944, per=100.00%, avg=1361.77, stdev=668.94
    lat (msec) : 4=0.01%, 10=86.71%, 20=6.76%, 50=4.17%, 100=1.84%
    lat (msec) : 250=0.40%, 500=0.09%, 750=0.01%
  cpu          : usr=1.27%, sys=2.48%, ctx=20355, majf=0, minf=21
  IO depths    : 1=0.1%, 2=0.1%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=0/w=20178/d=0, short=r=0/w=0/d=0

Run status group 0 (all jobs):
   READ: io=636240KB, aggrb=10603KB/s, minb=10603KB/s, maxb=10603KB/s, mint=60002msec, maxt=60002msec

Run status group 1 (all jobs):
   READ: io=444648KB, aggrb=7410KB/s, minb=7410KB/s, maxb=7410KB/s, mint=60002msec, maxt=60002msec

Run status group 2 (all jobs):
  WRITE: io=171592KB, aggrb=2859KB/s, minb=2859KB/s, maxb=2859KB/s, mint=60003msec, maxt=60003msec

Run status group 3 (all jobs):
  WRITE: io=80712KB, aggrb=1343KB/s, minb=1343KB/s, maxb=1343KB/s, mint=60058msec, maxt=60058msec

Disk stats (read/write):
  mmcblk0: ios=224443/51407, merge=45781/11664, ticks=404352/412872, in_queue=817232, util=99.69%

[Leopold]

Just tested a new card and got some crazy good numbers...

Samsung 16GB Class 10 Grade 1 48MB/s Micro SDHC Plus (MB-MPAGCAEU)
http://www.amazon.co.uk/Samsung-Class-M ... B00D6ENF7M £10.64

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 46.010 MB/s
Sequential Write : 36.343 MB/s
Random Read 512KB : 45.393 MB/s
Random Write 512KB : 36.277 MB/s
Random Read 4KB (QD=1) : 12.400 MB/s [ 3027.4 IOPS]
Random Write 4KB (QD=1) : 3.445 MB/s [ 841.0 IOPS]
Random Read 4KB (QD=32) : 11.771 MB/s [ 2873.9 IOPS]
Random Write 4KB (QD=32) : 3.591 MB/s [ 876.8 IOPS]

Test : 50 MB [F: 0.0% (0.0/14.6 GB)] (x5)
Date : 2014/07/26 19:10:27
OS : Windows 7 Enterprise SP1 [6.1 Build 7601] (x64)

[flytomars]

Hi Leopold,
Sorry to say but your test has no meaning as you tested the card not in the pi,
And the pi does not support the benefits of class 10- meaning it would work with the pi, but not give the results you jus got.

Just tested a new card and got some crazy good numbers...

Samsung 16GB Class 10 Grade 1 48MB/s Micro SDHC Plus (MB-MPAGCAEU)

-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 46.010 MB/s
Sequential Write : 36.343 MB/s
Random Read 512KB : 45.393 MB/s
Random Write 512KB : 36.277 MB/s
Random Read 4KB (QD=1) : 12.400 MB/s [ 3027.4 IOPS]
Random Write 4KB (QD=1) : 3.445 MB/s [ 841.0 IOPS]
Random Read 4KB (QD=32) : 11.771 MB/s [ 2873.9 IOPS]
Random Write 4KB (QD=32) : 3.591 MB/s [ 876.8 IOPS]

Test : 50 MB [F: 0.0% (0.0/14.6 GB)] (x5)
Date : 2014/07/26 19:10:27
OS : Windows 7 Enterprise SP1 [6.1 Build 7601] (x64)

[mikerr]

Hi Leopold,
Sorry to say but your test has no meaning as you tested the card not in the pi,
And the pi does not support the benefits of class 10- meaning it would work with the pi, but not give the results you jus got.

True, the Pi can't take advantage of the sequential figures, but his 4K random read/write are the important figures for Pi use, and those are high too.

Just tested a new card and got some crazy good numbers...

Samsung 16GB Class 10 Grade 1 48MB/s Micro SDHC Plus (MB-MPAGCAEU)
...
Random Write 4KB (QD=32) : 3.591 MB/s [ 876.8 IOPS]

[Leopold]

Hi Leopold,
Sorry to say but your test has no meaning as you tested the card not in the pi,
And the pi does not support the benefits of class 10- meaning it would work with the pi, but not give the results you jus got.

True, the Pi can't take advantage of the sequential figures, but his 4K random read/write are the important figures for Pi use, and those are high too.

Just tested a new card and got some crazy good numbers...

Samsung 16GB Class 10 Grade 1 48MB/s Micro SDHC Plus (MB-MPAGCAEU)
...
Random Write 4KB (QD=32) : 3.591 MB/s [ 876.8 IOPS]

Unfortunately this card seems to be incompatible with the Pi. I got filesystem corruption and boot failure on my B+.
It should be great in a tablet or smartphone though.

[Jessie]

Just figured I would post benchmarks I just did on my core i5 PC. First is the one that covers the topic here, an SD card I bought specifically for my B+. Cost was $8 on amazon, sold and delivered by Amazon.

Samsung Bench.JPG (39.94 KiB) Viewed 9505 times

The rest I have just copied text from the tests. First a Kingston Datatravler 100 G3 USB 3.0 drive tested in a 3.0 port and 2.0 Port. I have never used this one with any Pi other than to transfer files to devices with no internet connection.

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CrystalDiskMark 3.0.3 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    42.487 MB/s
          Sequential Write :    15.294 MB/s
         Random Read 512KB :    40.538 MB/s
        Random Write 512KB :    10.561 MB/s
    Random Read 4KB (QD=1) :     6.769 MB/s [  1652.5 IOPS]
   Random Write 4KB (QD=1) :     1.645 MB/s [   401.6 IOPS]
   Random Read 4KB (QD=32) :     8.443 MB/s [  2061.3 IOPS]
  Random Write 4KB (QD=32) :     1.178 MB/s [   287.6 IOPS]

  Test : 50 MB [D: 7.7% (2.2/29.0 GB)] (x1)
  Date : 2014/07/31 14:53:13
    OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
Kingston Datatravler 100 G3 USB 3.0 Port



-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    34.836 MB/s
          Sequential Write :    13.380 MB/s
         Random Read 512KB :    34.106 MB/s
        Random Write 512KB :     7.805 MB/s
    Random Read 4KB (QD=1) :     5.170 MB/s [  1262.1 IOPS]
   Random Write 4KB (QD=1) :     1.235 MB/s [   301.6 IOPS]
   Random Read 4KB (QD=32) :     5.650 MB/s [  1379.4 IOPS]
  Random Write 4KB (QD=32) :     1.437 MB/s [   350.9 IOPS]

  Test : 50 MB [D: 7.7% (2.2/29.0 GB)] (x1)
  Date : 2014/07/31 14:57:57
    OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
Kingston Dtatatravler 100 G3 USB 2.0 Port

This final drive is a Sandisk Cruiser 8G USB 2.0. I have used this drive several times as R Pi root filesystem. It feels snappy in use but the writes look real bad on it.

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-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    20.504 MB/s
          Sequential Write :     2.908 MB/s
         Random Read 512KB :    20.809 MB/s
        Random Write 512KB :     1.703 MB/s
    Random Read 4KB (QD=1) :     5.621 MB/s [  1372.3 IOPS]
   Random Write 4KB (QD=1) :     0.256 MB/s [    62.4 IOPS]
   Random Read 4KB (QD=32) :     5.160 MB/s [  1259.8 IOPS]
  Random Write 4KB (QD=32) :     0.186 MB/s [    45.5 IOPS]

  Test : 50 MB [E: 0.0% (0.0/7616.0 MB)] (x1)
  Date : 2014/07/31 15:31:39
    OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
Sandisk Cruiser 8GB USB 2.0

[warpigs12]

Sandisk 8GB Class 4

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-----------------------------------------------------------------------
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :    20.913 MB/s
          Sequential Write :     6.346 MB/s
         Random Read 512KB :    20.641 MB/s
        Random Write 512KB :     1.412 MB/s
    Random Read 4KB (QD=1) :     5.240 MB/s [  1279.4 IOPS]
   Random Write 4KB (QD=1) :     1.115 MB/s [   272.2 IOPS]
   Random Read 4KB (QD=32) :     5.206 MB/s [  1270.9 IOPS]
  Random Write 4KB (QD=32) :     0.983 MB/s [   240.0 IOPS]

  Test : 100 MB [E: 0.0% (0.0/127.7 MB)] (x5)
  Date : 2014/07/29 9:14:07
    OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)

Captura de tela 2014-10-23 15.28.31.png (42.34 KiB) Viewed 8525 times