dome77
Posts: 8
Joined: Tue May 10, 2016 5:09 pm

Please help me choose a microsd card.

Tue May 10, 2016 5:21 pm

Hello. First time poster here.

I am in the process of getting the peripherals needed for the RaspPi 3 which I have yet to order. I am having trouble purchasing the 8 gb class 6 microsd which the Pi people recommend. So far most cards on ebay are either class 4 or class 10. In looking at data which experienced Pi users have produced concerning size and class of microsd cards, I am totally baffled.

Can someone make it simpler for me, please. As a beginner who will probably start by doing web surfing, watching youtube videos or LibreOffice Writer, which size and class would be most suitable for me and the best buy for my money?
Last edited by dome77 on Tue May 10, 2016 5:59 pm, edited 1 time in total.

gordon77
Posts: 4295
Joined: Sun Aug 05, 2012 3:12 pm

Re: Please help me choose a microsd card.

Tue May 10, 2016 5:51 pm

I use SanDisk ultra type 10, 16 or 32GB, no issues

dom
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 5370
Joined: Wed Aug 17, 2011 7:41 pm
Location: Cambridge

Re: Please help me choose a microsd card.

Tue May 10, 2016 5:52 pm

Samsung EVO/EVO+ would be my choice. Very fast. E.g. this.

Be a bit careful of buying on eBay - there are a lot of fakes about. I'd trust Amazon (not Amazon marketplace).

User avatar
Rive
Posts: 586
Joined: Sat Mar 26, 2016 5:21 pm
Location: USA

Re: Please help me choose a microsd card.

Tue May 10, 2016 5:57 pm

dom wrote:Samsung EVO/EVO+ would be my choice. Very fast. E.g.
Image
Second this. $11 at Bestbuy (in US) 32GB EVO+ UHS-1/HC-1
40MB/s read, 20 MB/s write speeds if you overclock it using:

(that means it is very fast) ;)

/boot/config.txt

Code: Select all

dtparam=sd_overclock=100
Speed results:

Code: Select all

[email protected]:~ $ sudo ./sdbench.sh
[3;J
CONFIG: 
CLOCK : 100.000 MHz
CORE  : 500 MHz, turbo=1
DATA  : 512 MB, /root/test.dat

HDPARM:
======
 Timing O_DIRECT disk reads: 126 MB in  3.01 seconds =  41.86 MB/sec
 Timing O_DIRECT disk reads: 124 MB in  3.03 seconds =  40.89 MB/sec
 Timing O_DIRECT disk reads: 122 MB in  3.02 seconds =  40.40 MB/sec

WRITE:
=====
536870912 bytes (537 MB) copied, 25.5738 s, 21.0 MB/s
536870912 bytes (537 MB) copied, 22.3328 s, 24.0 MB/s
536870912 bytes (537 MB) copied, 23.7269 s, 22.6 MB/s

READ:
====
536870912 bytes (537 MB) copied, 12.8048 s, 41.9 MB/s
536870912 bytes (537 MB) copied, 12.3227 s, 43.6 MB/s
536870912 bytes (537 MB) copied, 12.3561 s, 43.4 MB/s

RESULT (AVG):
============
Overlay config                      core_freq   turbo   overclock_50    WRITE        READ        HDPARM
                                       500        1     100.000 MHz   21.51 MB/s   40.99 MB/s   41.06 MB/s
DNPNWO

dome77
Posts: 8
Joined: Tue May 10, 2016 5:09 pm

Re: Please help me choose a microsd card.

Tue May 10, 2016 9:40 pm

Thank you for all those responses. Based on your recommendations, I will be purchasing from Amazon.

Return to “General discussion”