gamefroot
Posts: 2
Joined: Mon Jul 23, 2012 7:23 am

SD card help - NZ supplier

Mon Jul 23, 2012 7:33 am

Hello,

Sorry to post this question here on your forums - I understand how busy everybody is.

I can't figure out what SD card to purchase - we're building a machine that will be running a web based application. The faster the better :)

Here are the options: http://www.ascent.co.nz/search.aspx?T1=sd+card&D1=2101

Best,
Dan

dukla2000
Posts: 190
Joined: Tue Jan 10, 2012 12:02 am
Location: Reading.UK.EU

Re: SD card help - NZ supplier

Mon Jul 23, 2012 9:28 am

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.
Daily driver: Pi3B, 64GB Samsung Evo+ @100MHz, DVB-T, onboard WiFi for internet, BT/USB dongle for KB/mouse, 250GB HDD via USB for media, Raspbian Jessie Lite with Openbox desktop.
Museum: Pi B

gamefroot
Posts: 2
Joined: Mon Jul 23, 2012 7:23 am

Re: SD card help - NZ supplier

Wed Jul 25, 2012 10:59 am

Thanks for the help. I've decided to go with this one:
http://www.ascent.co.nz/productspecific ... ID=8342012

We'll probably get a http://pibow.com/ case too :)

Best,
Dan

dukla2000
Posts: 190
Joined: Tue Jan 10, 2012 12:02 am
Location: Reading.UK.EU

Re: SD card help - NZ supplier

Wed Jul 25, 2012 10:00 pm

Looks about equivalent to the card I run my Pi on - just remember you will need an adapter to convert the micro-SD to full SD. It may come with one (my class 6 micro did) or you may have some spare somewhere anyway. Seems a good price too.
Daily driver: Pi3B, 64GB Samsung Evo+ @100MHz, DVB-T, onboard WiFi for internet, BT/USB dongle for KB/mouse, 250GB HDD via USB for media, Raspbian Jessie Lite with Openbox desktop.
Museum: Pi B

Wendo
Posts: 142
Joined: Sun Jun 10, 2012 8:27 pm

Re: SD card help - NZ supplier

Sun Jul 29, 2012 8:14 pm

Welcome, another kiwi!

I've got some Adata cards running here but they are slow, course they were also cheap so I can't complain too much

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