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Results: Power Testing

Samsung 850 Pro SSD Review: 3D Vertical NAND Hits Desktop Storage
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Active Idle Power Consumption

Idle consumption is the most important power metric for consumer and client SSDs. After all, solid-state drives complete host commands quickly and then drop back down to idle. Aside from the occasional background garbage collection, a modern SSD spends most of its life doing very little. Enterprise-oriented drives are more frequently used at full tilt, making their idle power numbers less relevant. But this just isn't the case on the desktop, where the demands of client and consumer computing leave most SSDs sitting on their hands for long stretches of time.

Active idle power numbers are critical, especially when it comes to their impact on mobile platforms. Idle means different things on different systems, though. Pretty much every drive we're testing is capable of one or more low-power states, up to and including the DevSlp stuff we covered on the previous page.

Idle power consumption is stated as up to .4 W maximum by Samsung, but I see a steady .28 W each for the 128, 256, and 1024 GB 850 Pro. Rounding gives the 256 GB model an extra hundredth.

PCMark 7 Average Power Consumption

If we log power consumption through a workload, even a relatively heavy one, we see that average use is still pretty close to the idle numbers. Maximum power may spike fiercely, but the draw during a PCMark 7 run is light. You can see the drives fall back down to the idle "floor" between peaks of varying intensity.

All three capacities peak between 2 and 3 W, and each drops down to .3 W in between jobs. Because each drive comes equipped with a different amount of flash, they don't line up exactly. But it's easy to see that the 850 Pro is easy on power, even during heavy use.

The maximum power consumption of Samsung's 1 TB 850 Pro is around 3 W. Exact figures for the other capacities are given. The transition is smooth, though. I believe that different die sizes are being used for the smaller drives. But without knowing more about V-NAND, only Samsung's tight-lipped engineers know for sure.

Display all 43 comments.
  • 0 Hide
    iknowhowtofixit , June 30, 2014 8:19 PM
    Hmm, what's next for SATA? SATA4? SATA 3.2 (SATA Express) doesn't look like a long term solution. PCI-E is fine, but SATA is still so convenient.
  • 2 Hide
    MoulaZX , June 30, 2014 8:34 PM
    I 'just' ordered 2x Samsung EVO 120GB a few hours ago, then I stumbled onto this article. Damn it! Damn it! Damn it! Every freaking time I run into this, be it Storage, CPU, or GPU.... -_-
  • 2 Hide
    cryan , June 30, 2014 8:41 PM
    Quote:
    I 'just' ordered 2x Samsung EVO 120GB a few hours ago, then I stumbled onto this article. Damn it! Damn it! Damn it! Every freaking time I run into this, be it Storage, CPU, or GPU.... -_-


    I don't know if this really changes anything for you. Two EVOs are still going to be better than one 850 Pro in [most] every way. But I understand the sentiment!

    Christopher Ryan
  • 5 Hide
    lp231 , June 30, 2014 9:05 PM
    Quote:
    I 'just' ordered 2x Samsung EVO 120GB a few hours ago, then I stumbled onto this article. Damn it! Damn it! Damn it! Every freaking time I run into this, be it Storage, CPU, or GPU.... -_-

    You just ordered a few hours ago. Just cancel your order if you really want this 850 Pro.
  • 6 Hide
    tomfreak , June 30, 2014 9:12 PM
    10yrs warranty, may be finally I have a reason to buy SSD. lol
  • 7 Hide
    g-unit1111 , June 30, 2014 9:42 PM
    Quote:
    10yrs warranty, may be finally I have a reason to buy SSD. lol


    I can guarantee that in 10 years you won't own that drive anymore. :lol: 
  • 3 Hide
    10tacle , June 30, 2014 9:52 PM
    I still have several 8-10 year old drives laying around between 80GB-150GB. I mostly use them as external drives for backing up USB thumb drives and other files that aren't large volume.
  • 1 Hide
    helper800 , June 30, 2014 9:54 PM
    Hoping for some SATA 12gbs (or more) transfer speeds in the coming years.
  • 0 Hide
    razor512 , June 30, 2014 9:56 PM
    Will overclocking the bus that the sata controller is on impact the performance?

    Can you test on an AMD platform which makes it easier to over clock that bus and some of the connected components?
  • -1 Hide
    BestJinjo , July 1, 2014 2:05 AM
    Looking forward to future generations of 3D Vertical Nand on M.2 / M.2 Ultra interface. Too bad SATA 3 is all maxed out and the next generation standards are not yet mainstream for the masses which is holding back SSD performance. As far as this drive goes, it's only slightly faster than MX100 but costs double. I don't think it's worth it. MX100 512GB sounds like a perfect stop-gap until M.2/SATAe drives arrive with 1-1.5TB/sec throughput. Perhaps Samsung will give us 95% of the performance for a fraction of the price in the 850 EVO.
  • 0 Hide
    MoulaZX , July 1, 2014 4:49 AM
    Quote:
    Quote:
    I 'just' ordered 2x Samsung EVO 120GB a few hours ago, then I stumbled onto this article. Damn it! Damn it! Damn it! Every freaking time I run into this, be it Storage, CPU, or GPU.... -_-


    I don't know if this really changes anything for you. Two EVOs are still going to be better than one 850 Pro in [most] every way. But I understand the sentiment!

    Christopher Ryan


    Not quite. One is for my Desktop, the other is for my Father's Desktop.

    For my Desktop, I'll be stepping up from 2x OCZ Vertex 2 60GB in RAID 0. Hope it'll be worth it...
  • 0 Hide
    MoulaZX , July 1, 2014 5:00 AM
    Quote:
    Quote:
    I 'just' ordered 2x Samsung EVO 120GB a few hours ago, then I stumbled onto this article. Damn it! Damn it! Damn it! Every freaking time I run into this, be it Storage, CPU, or GPU.... -_-


    I don't know if this really changes anything for you. Two EVOs are still going to be better than one 850 Pro in [most] every way. But I understand the sentiment!

    Christopher Ryan


    Not quite. One is for my Desktop, the other is for my Father's Desktop.

    For my Desktop, I'll be stepping up from 2x OCZ Vertex 2 60GB in RAID 0. Hope it'll be worth it...
  • 1 Hide
    cpy , July 1, 2014 5:19 AM
    Why does tom hardware looks like website from 1990? This page is narrow as hell!
  • 2 Hide
    Flying-Q , July 1, 2014 5:40 AM
    Quote:
    Why does tom hardware looks like website from 1990? This page is narrow as hell!

    That would be to give more room for the sidebar adverts.
  • 0 Hide
    Novuake , July 1, 2014 6:02 AM
    Impressive, didn't think some of these numbers were possible via SATA3.

    But the limit has now been reached in almost every way.

    Which solution will stick? Anyone care to guess?
  • 0 Hide
    crawlgsx , July 1, 2014 6:14 AM
    Eh, unimpressed. Sure its a nice bump but when I look at how long the 840 Pro has been on the market and compare it to the increase to the soon coming 850 Pro, to say the least it doesn't make me want to run out and replace my 840's.
  • 3 Hide
    cryan , July 1, 2014 7:44 AM
    Quote:
    Hmm, what's next for SATA? SATA4? SATA 3.2 (SATA Express) doesn't look like a long term solution. PCI-E is fine, but SATA is still so convenient.


    I disagree. SATA Express melds the convenience of SATA and pcie performance. With NVMe and Gen 3 PCIe, I think there WILL be much to like.

    Christopher Ryan
  • 0 Hide
    RedJaron , July 1, 2014 8:21 AM
    That much speed for that little power draw? Impressive.
  • -1 Hide
    arneberg , July 1, 2014 8:21 AM
    SATA Express haw to wide Cables as bad as the old IDE Cables M.2 or PCIE cards
  • 1 Hide
    xenol , July 1, 2014 8:23 AM
    Part of me doesn't care about bandwidth. I've had Windows 7 load up much faster (as in the throbber didn't get to finish) on a laptop with a SATA 3Gbps interface than a desktop using the 6Gbps interface. And most of the time file accesses are small, but many.

    I'd rather start seeing IOPS crank up to RAM levels.
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