on2k17nm
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Best 64GB SD card for use with Raspberry Pi 3 Model B

Tue Nov 22, 2016 10:41 am

I want to purchase a 64GB SD card for my newly procured RPi3 Model B.
Please suggest me a best SD card that will run me into least issues.

I have seen the http://elinux.org/RPi_SD_cards, where I see
Samsung microSDHC 64 10 MB-MGCGBA/AM
But looks like this is old (not able to find the card on online stores like Amazon etc).

How about these --
ok SanDisk SDXC 64 10 Extreme(SDSDQXN-064G-G46A) UHS-I: works with 2015-02-16-wheezy-raspbian map7 02/03/2015
ok SanDisk SDXC 64 10 Extreme (SDSDX-064G-X46) 45 MB/s UHS-I: works with 2012-07-15-wheezy-raspbian Cracki 10 Aug 2012
ok SanDisk SDXC 64 10 Ultra (SDSDQUAN-064G-G4A) 2015-02-16-wheezy-raspbian works well.

I intend to run Fedora Linux on the RPi.

Please advise.

Tinderbox (UK)
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Tue Nov 22, 2016 12:22 pm

Last edited by Tinderbox (UK) on Tue Nov 22, 2016 1:18 pm, edited 1 time in total.
Raspberry Pi 3 Model B

gordon77
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Tue Nov 22, 2016 12:34 pm

I've had no issues with Sandisk cards, mainly use Ultra and Extreme. They say XC- I or UHS-I / HC-I


on2k17nm
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Tue Nov 22, 2016 2:32 pm

on2k17nm wrote:
Thanks for pointing out the links, they are immensely helpful..
Especially the 3rd link

- Onkar


fruitoftheloom
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Tue Nov 22, 2016 2:46 pm

on2k17nm wrote:
But now I am more confused than what I was before posting this question :-)
Not surprised use this newer blog:

http://www.pidramble.com/wiki/benchmarks/microsd-cards

Look for a Samsung Pro+ or Sandisk Extreme 64GB, but buy from a reputable source, many fakes on eBay etcetera...
Last edited by fruitoftheloom on Tue Nov 22, 2016 2:53 pm, edited 2 times in total.
Retired disgracefully.....

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pi-anazazi
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Tue Nov 22, 2016 2:48 pm

...more information does not necessarily mean better decisions. Rule no. 1 for decision making.

Sometimes more info simply leads to the conclusion to make no decision at all.

Go for some decent class 10 SanDisk card and start your project. 8-)
Kind regards

anazazi

Tinderbox (UK)
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Tue Nov 22, 2016 4:09 pm

I usually prefer Samsung and Sandisk but there are a lot of fakes of these memory brands, you can download a fake flash memory tester app, or even an android app that reads the internal details of the card.

John.
Raspberry Pi 3 Model B

tweak42
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Wed Nov 23, 2016 1:49 am

I prefer the Samsung EVO+ (red color) cards for their fast 4k read/writes. 32GB or 64GB whatever is onsale at my local BestBuy or Fry's electronics.

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HawaiianPi
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Wed Nov 23, 2016 7:32 am

tweak42 wrote:I prefer the Samsung EVO+ (red color) cards for their fast 4k read/writes. 32GB or 64GB whatever is onsale at my local BestBuy or Fry's electronics.
+1

The EVO+ is probably the best bang for the buck. When used on a computer like the Pi3 they outperform many much more expensive cards because they have very good random I/O performance. Most SD cards are highly optimised for sequential I/O and are very poor at random (non-sequential) I/O. This makes SD cards a poor choice for a computer OS drive because a lot of what computers do is non-sequential.

Switching from the various brands of SD cards I already had to Samsung EVO+ cards made a noticeable difference in performance on my Pi3. I tried an even faster (and much more expensive) Samsung Pro card, but if there was any further improvement it was negligible. The EVO+ seems to be the sweet spot for the Pi3 (which does not support the higher performance U1 or U3 write modes).

Over the past several months I have managed to get five Samsung EVO+ 32GB cards for less than ten bucks each.
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Tinderbox (UK)
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Wed Nov 23, 2016 9:49 am

Buyers on Amazon UK are reporting they have received an FAKE Samsung EVO+ 32GB so read the reviews and do not buy from the fake memory sellers.

John
Raspberry Pi 3 Model B

jahboater
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Wed Nov 23, 2016 10:04 am

I look at the 4K random read value in the published benchmarks as I suspect that affects the OS performance most.

Unless a file is very large (or memory is otherwise constrained), you will never have to wait for a file to be written - the OS simply writes to the disk cache in memory and it is then written to the physical SD card at some arbitrary later time (which is why you should always cleanly shut down the Pi). Reading on the other hand does (at first anyway) have to wait for the physical card. The OS will read and write data in 4K blocks.

You can use "free -h" to see how much data is cached. Much of the "Cached" figure is data that's been read - the OS keeps it in memory so that if its read a second time its instantly available. Typing "sync" forces any dirty blocks in memory to be written out.

The write speed will likely affect the initial OS imaging time (dd) but I don't care much about that.

Samsung Evo+, Samsung Pro+, and Sandisk Extreme Pro seem consistently good.

Note: all the above comments about caching are a gross over-simplification.

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HawaiianPi
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Sun Apr 15, 2018 12:31 am

isaacnmm wrote:
Sat Apr 14, 2018 7:11 pm
I would go with the Sandisk Extreme and Samsung Pro+ 64GB. Notably, check only relieble and legit sellers on Amazon. There are many fakes.
This question was from 2016, and the new "A1" class cards are better than anything previously recommended. SanDisk has a line of Ultra A1 cards that are reasonably priced and excellent performers. Of course they also have the Extreme A2 series if you really want to spend way-too-much on an SD card for your Raspberry Pi.

If you want the best performance, run your Pi from an SSD.
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RealistikDash
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Wed Jun 06, 2018 9:23 pm

I personally have had bad experience with the SanDisk Ultras. One of them just smoked off and died. It is unreadable. I heard the Samsung Evos are good.

jahboater
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Fri Jun 08, 2018 6:17 am

HawaiianPi wrote:
Sun Apr 15, 2018 12:31 am
Of course they also have the Extreme A2 series if you really want to spend way-too-much on an SD card for your Raspberry Pi.
Do you mean these?

https://www.sandisk.com/home/memory-car ... rosd-400gb
and here
https://www.tomshardware.co.uk/sandisk- ... 57965.html
$300 doesn't seem too unreasonable for such bleeding edge technology and huge capacity.

I have not seen any A2 cards for sale yet. I wonder how they will compare to an SSD ...

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HawaiianPi
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Re: Best 64GB SD card for use with Raspberry Pi 3 Model B

Fri Jun 08, 2018 8:38 am

jahboater wrote:
Fri Jun 08, 2018 6:17 am
$300 doesn't seem too unreasonable for such bleeding edge technology and huge capacity.
Yes, but for that money you could buy a much larger SSD that should handily outperform the SD card. Samsung EVO860, Crucial MX500, WD Blue and Sandisk Ultra 1TB SSD are all under $250, which leaves plenty left over for a USB-SATA adapter or enclosure.

Honestly, it's ridiculous to spend that much on a micro-SD card for a Raspberry Pi, which does not even support the higher performance protocols (the Pi doesn't even support U1, much less U3).

jahboater wrote:
Fri Jun 08, 2018 6:17 am
I have not seen any A2 cards for sale yet. I wonder how they will compare to an SSD ...
Micro SD cards will never match the performance of SSD. Beyond the physical size limitations, they are different devices designed for different purposes.

RealistikDash wrote:
Wed Jun 06, 2018 9:23 pm
I personally have had bad experience with the SanDisk Ultras. One of them just smoked off and died. It is unreadable. I heard the Samsung Evos are good.
The Samsung EVO+ is still a decent performer, but the SanDisk Ultra A1 is better (and less expensive). I've also heard the newer EVO Plus ("Plus" spelled out, as opposed to "+") doesn't perform as well in the Pi computers, but I have not verified that myself. I have several SanDisk Ultra A1 cards, and none have given me trouble. You probably got a defective card, which is bad luck, but not necessarily indicative of a bad product.
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