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Samsung PM841 512GB mSATA SSD Review – Performance and Capacity in a Client SSD

Samsung PM841 512GB mSATA SSD Featured ImageOn the TSSDR Test Bench today is the Samsung PM 841 mSATA SATA 3 SSD, this particular sample being the highest capacity mSATA SSD that we have tested to date at 512 GB.

Unlike the Mushkin Atlas 480GB mSATA SSD that we have reviewed previously, the PM841 is the first to be offered in a single PCB design and housing only four modules of memory, each being 128GB in size.

MythlogicOur sample Samsung PM841 512GB mSATA SSD was accompanied by an introduction to MYTHLOGIC Computers of Ann Arbor, Michigan, a high end gaming PC Company that easily stands above the crowd in SSD selection within configurations of their custom systems.

MYTHLOGIC’s goal is to provide the most custom options, achieving the highest level of performance, using the highest of quality parts, at a competitive price. Our thanks goes out to Josh Tacey, Director of Technical Operations at MYTHLOGIC, for offering us a sample of their first received PM841 shipment even before Samsung’s own offering of a sample for review.

PM841 MSATA SSD SPECIFICATIONS

The Samsung PM841 is an OEM client level SSD that is manufactured in capacities of 128, 256 and 512GB. This means that, other than through limited Amazon availability, it is not made available by Samsung for retail consumer purchase and might typically be found within pre-configured PC portable systems. At the time of this report, the PM841 was available in capacities of 128, 256 and 512GB, the highest capacity being only $449 which is an excellent price. Performance is listed at 540MB/s read and 330MB/s write with up to 95,000 IOPS and the PM841 has on board AES 256-bit encryption with a power draw of .005W idle and 3.44W active. PM841 warranty would be as listed through the company selling the system in which the SSD was contained.

Samsung PM841 512GB mSATA SSD Front

PM841 MSATA SSD COMPONENTS

The Samsung PM841 MSATA SSD is under 10 grams in weight, constructed of a single printed circuit board (PCB), and it’s controller matches that of the Samsung 840 Pro family that we reviewed earlier. It contains Samsung’s own 3-core eight channel MDX controller (300MHz), along with four modules of their own 21nm TLC toggle mode NAND ,flash memory, each with a capacity of 128GB.

Samsung PM841 512GB mSATA PCB front

Also found just above the controller is Samsung’s 512MB DRAM cache memory which makes the only 100% company manufactured new generation SSD available today. This is the first we have ever seen 128GB capacity in a single memory module for a total of 512GB with four modules on board. Formatting the drive leaves the end user with 477GB of available storage.

Samsung PM841 512GB mSATA PCB Back

Considering the possibilities, Samsung could easily create a 2TB 6Gbps 840 Pro SSD by including 16 of these memory packages on a single 2.5″ notebook SSD PCB. For our testing, we have also used an Intel mSATA to SATA 3 adapter as seen here:

Samsung PM841 512GB mSATA SSD Adapter 1

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Arthur Brownlee IV
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Arthur Brownlee IV

Thanks for the review, was looking to find a good high capacity SSD for my Ultrabook. Looks like I can swoop up the Samsung instead of the Atlas which I was hesitant about.

Les@TheSSDReview
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They are sold out presently and expect to be until the 28th. We have several e-mails already regarding lack of stock.

Ted
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Ted

Are there any updates on ETA on the PM841 512GB? I’ve been looking everywhere but no one has them in stock!

Les@TheSSDReview
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They apparently sell out faster than they can et them in. I might contact the seller listed on Amazon and see if you can reserve one.

Ja Man
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FREE Samsung 840 Pro 512gb Giveaway:
http://www.woobox.com/bb2i9m/3b2c4e

Gregoire Gentil
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Gregoire Gentil

I’m wondering if this 512GB will be used in the new Samsung Series 900X3E (1080p screen). In USA, NP900X3E-A02US=128GB, NP900X3E-A03US=256GB and there is no trace of 512GB. While in UK, NP900X3E-A01UK=256GB, NP900X3E-A03UK=512GB and there is no trace of 128GB. Totally confusing. As of end of April, only NP900X3E-A02US is available at Amazon. I think that I will buy NP900X3E-A02US, then buy and replace by a 480GB Muskin. I hope that the Series 900X3E uses a mSSD and Muskin can fit into it. Samsung (like Apple) really overprices the storage as $(NP900X3E-A03US) – $(NP900X3E-A02US) ~ $500 >> expected $1 * 128GB… Read more »

Les@TheSSDReview
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If you were hoping fot the reviewed drive, isn’t that cheaper than the Mushkin? They sold out within a day but should be restocked and available by end month so stay tuned. Nice systems though but I can’t see Samsung making a 512GB standard as it would cost too much for purchase. We should be happy that they are using their own mSATA SSDs finally…or are they?

Luke Macaulay
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Luke Macaulay

Thanks for the review. I don’t see any other large capacity SSDs out there so I’ll be keeping an eye out for when they come back in stock. I presume these would be compatible with most systems? I have a Lenovo Ideapad Yoga 13…

kackburt
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kackburt

Any chance to get firmware upgrades here? mine isn’t recognized by the Magician software from Samsung.
(btw. the SSD came with my 900X4D)

Les@TheSSDReview
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Any chance to get firmware upgrades here? mine isn’t recognized by the Magician software from Samsung. Funny hitch though having bought it in a Samsung system and still not being able to use it with the Magician. Did Samsung Magician come pre-installed on the machine?

kackburt
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kackburt

No it wasn’t unfortunately… I installed it myself to give it a try. I just read somewhere that the Magician supports consumer SSDs only and it seems like the PM841 isn’t one of those.