Ouch - those prices make my eyes water! (Last week got a SanDisk 8GB microSDHC class 4 delivered for < NZD8!) Based on
Chromatix words of wisdom in
this thread I have recently bought a couple of SanDisks that all perform well with the Extreme (UHS-1) being my pick, followed by the Mobile Ultra Class 6 and the Class 4 Mobile Ultra beaten into 4th place by a no-name brand class 10 I have. Basically my testing has focussed on the small file write speed - subjectively the cards that perform better on that synthetic test also feel faster but I have not been able to concoct a repeatable and meaningful application test to substantiate that.
My test results are below - time is in seconds for
sync; rm -rf testing*; sync; time ( for item in `seq 1 2560`; do dd status=noxfer if=/dev/zero of=testing.$item bs=1k count=4; sync; done; )
on my Pi with arm_freq=850
Code: Select all
Maker Capacity Model Class Cost 4kB*2560
Sandisk 8GB Extreme SDHC UHS-1 £8.09 182.004
Sandisk 8GB Mobile Ultra micro 6 £5.59 193.461
16GB MicroSD HC 10 195.527
Sandisk 8GB Mobile Ultra micro 4 £3.99 200.160
Novatech 8GB USB3 memory stick £8.98 227.500
Kingston 2GB MicroSD 41 810.534
So my recommendation is SanDisk with the higher Class specs. In other threads here I think folks have got good benchmarks from A-Data as well.
