====== Flash Memory Benchmarks ======

Because I've got a load of different type of flash memory cards in my spares box, I maintain a spreadsheet and performance data list for them all.

{{:blog:flashmemorybenchmarks.png?800|}}

{{ :blog:flash_media_comparison.xlsx |}}
===== Compact Flash =====

==== Canon FC-8M 8MB ====

{{:blog:img20210124141803.jpg?200|}}

Disk benchmark does not complete.

Output from //hdparm -t//

<code>
 Timing buffered disk reads:   2 MB in 23.81 seconds =  86.00 kB/sec
</code>

First card I owned, from a Canon Powershot 2Mpix camera.
==== Delkin 511MB ====

{{:blog:img20210124143152.jpg?250|}} {{:blog:delkin_511mb.png?250|}}
==== Integral 64MB ====

{{:blog:img20210124141810.jpg?200|}}

Disk benchmark does not complete.

Output from //hdparm -t//

<code>
 Timing buffered disk reads:   2 MB in 22.76 seconds =  89.99 kB/sec
</code>

I suspect this one is virtually dead.

==== Kingston Elite Pro 133x 4GB ====

{{:blog:img20210124143917.jpg?200|}} {{:blog:kingston_elitepro_133_4gb.png?250|}}

==== Kingston Elite Pro 133x 8GB ====

{{:blog:img20210124141828.jpg?200|}} {{:blog:kingstone_elitepro_133_8gb.png?250|}}

==== Kingston Ultimate 266x 16GB ====

{{:blog:img20210124141839.jpg?200|}} {{:blog:kingston_ultimate_266_16gb.png?250|}}

==== Sandisk Extreme IV 2.0GB ====

{{:blog:img20210124141820.jpg?200|}} {{:blog:sandisk_extreme_iv_2gb.png?250|}}

==== Sandisk Ultra II 4.0GB ====

{{:blog:img20210124143619.jpg?200|}} {{:blog:sandisk_ultra2_4gb.png?250|}}
==== Sandisk Ultra 50MB/s 16GB ====

{{:blog:img20210124141849.jpg?200|}} {{:blog:sandisk_ultra_50mbs_16gb.png?250|}}

==== Sandisk Extreme 120MB/s 64GB ====

Wow. Very, //very// fast. 

{{:blog:img20210127131929.jpg?200|}} {{:blog:cf_sandisk_extreme_120_64gb.png?250|}}
==== Transcend 133x 8GB ====

{{:blog:img20210124141815.jpg?200|}} {{:blog:transcend_133_8gb.png?250|}}

===== SD Cards =====

==== Crucial 2GB ====

{{:blog:sd_crucial_2gb.png?250|}}
==== Integral Ultima XC I 64GB ====

Really odd performance with this one.

{{:blog:sd_integral_64gb.png?250|}}
==== Sandisk 2GB ====

{{:blog:sd_sandisk_2gb.png?250|}}

==== Sandisk Ultra 30MB/s 32GB ====

{{:blog:sd_sandisk_ultra_32gb.png?250|}}
==== Sandisk Ultra II 2GB ====

{{:blog:sd_sandisk_ultra_2gb.png?250|}}
===== Micro SD Cards =====

==== Sandisk Ultra HC I 8GB ====

Strong read performance.

{{:blog:microsd_sandisk_hci_8gb.png?250|}}
==== Kingston HC 4 32GB ====

Pretty slow.

{{:blog:microsd_kingston_hc4_32gb.png?250|}}
==== Transcend XC I A1 V30 128GB ====

Excellent performance, but what is up with the write performance fluctuation? Does this thing have a SLC buffer that is getting flushed every so many megabytes?

{{:blog:microsd_transcend_x1_a1_v30.png?250|}}
==== Integral XC I A1 256GB ====

{{:blog:microsd_integral_256gb.png?250|}}
==== UNKNOWN HC 32GB ====

Failed test. Was averaging 10MB/s read before failure.

{{:blog:sd_unknown_32gb.png?250|}}