Many of the reviews you’ll see are from products which I’ve ended up buying out of necessity and decided I should give them a thorough test run before putting them into use. This is no different – as a departure from my previous practice of buying Sandisk Ultra microSDXC cards, when I needed another microSDHC card, I decided to knock on Samsung’s door instead.
This particular card we’re looking at today is the Samsung Plus 32Gb UHS-I microSDHC (Model MB-MPBGB/KR). This card appears to be Korean market stock, as the cards are not locally available. Instead, I purchased this through an unnamed eBay seller at AU$27, which is an acceptable price for a UHS-I/Class 10 card. This claims to be “up to 48MB/s transfer speed with UHS-I”. We’ll put that claim to the test. The card also came with a Samsung branded adapter separately in a bag – a nice touch by the seller.
The rear of the packaging screams of its waterproof, magnet proof, temperature proof and x-ray proof qualities with a 10 year limited warranty (although it’s unlikely I would be able to claim against that). The rest of the text is in Korean, as this appears to be for Korean distribution.
The card’s data is as follows:
Size: 31,440,502,784 bytes CID: 1b534d303030303010d5f0081600da5f CSD: 400e00325b590000ea3f7f800a4040c3
This card was first put through my torture test of filling the card with random data and MD5-hashing the whole card three times. Consistent results were achieved, indicating the card is “sane”.
Testing this card was done with the traditional combination of the Transcend RDF8 as well as with the new Kogan RTS5301 based reader. The Transcend RDF8 results can be compared with the rest of the cards.
Sequential Read – HDTune with Transcend RDF8
Sequential Read – HDTune with Kogan RTS5301
Testing with both readers yielded similar results, with sequential sustained reads averaging in ~ 32Mb/s. This is below the 48Mb/s claimed on the box, but it may be due to the way HDTune accesses the card. Lets try CrystalDiskMark.
CrystalDiskMark – Transcend RDF8
CrystalDiskMark – Kogan RTS5301
Interesting, the read on CrystalDiskMark approaches 48Mb/s but doesn’t quite get there on both readers. There is a difference in sequential write speed between the two, favouring the RDF8, with the tables turned on the sequential read test. The 512kB accesses shows an anomaly on the write speed on the RTS5301, similarly to how the Sandisk Ultra had an anomaly on the same test but instead favouring the RDF8. This is likely due to timing factors.
Regardless, the card puts up a great performance that beats the Sandisk Ultra 64Gb UHS-I SDXC I have, and that’s a great thing. It’s also a well rounded performer, and its small block performance isn’t bad at all.
UPDATE: It seems that this card has compatibility issues with the Raspberry Pi Model B+. You should probably avoid it if you intend to use it with the Raspberry Pi altogether.
That’s also got me thinking – how does the Samsung Pro microSDHC compare to the Samsung Plus?