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Results: Power Consumption

The Crucial M550 SSD Review: Striking Back With More Performance
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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 DevSleep. That last feature is a part of the SATA 3.2 host specification. And while it requires a capable SSD and a compatible platform, enabling it takes power consumption down to a very small number.

Marvell's 88SS9189 features enhanced power management (at least, that's what Crucial tells us). The improvements don't only affect active idle consumption, either. Partial hibernation and DevSlp are also more efficient. Desktop users aren't going to care much, but given the M500's mediocre power numbers, Crucial needed better performance in this metric to make the M550 a more attractive mobile option. 

The M550 does represent forward progress, but it still can't hold a candle to Samsung's efforts. This is the first benchmark where the 840 EVO scores a meaningful victory over the M550.

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 usage seen during a PCMark 7 run is pretty light. You can see the drives fall back down to the idle "floor" between peaks of varying intensity.

If I knew nothing else about the M550s and was shown this chart, I'd assume that the drives are very fast. There's no real drama to report on; reads and writes are handled quickly before power drops back into the idle range. The spikes don't last long, and the initial few minutes of the benchmark, which sometimes reveal awkward power use, are instead quite clean.

Average power consumption across PCMark 7 represents an improvement over Crucial's 480 and 960 GB M500s. But higher-than-average active idle still hurts the new M550s a bit.

Maximum Observed Power Consumption

Higher-capacity drives use more power under heavy loads. No surprise there.

Display all 16 comments.
  • 2 Hide
    ikyung , March 18, 2014 2:44 PM
    Heard rumors of Samsung planning to market the 850 with aggressive pricing this year. Would like to see Crucial and Samsung duke it out in pricing.
  • 1 Hide
    _potts_ , March 18, 2014 2:50 PM
    I just splashed $250 (delivered to Oz) on a M500 480GB mSATA, eh, can't complain.
  • 0 Hide
    cryan , March 18, 2014 3:51 PM
    Quote:
    Heard rumors of Samsung planning to market the 850 with aggressive pricing this year. Would like to see Crucial and Samsung duke it out in pricing.
    They already have IMHO. The Samsung 840 EVO is significantly cheaper than it was at launch. It and the M500 have seemed to move in lockstep. Along the way, we've seen other manufacturers follow suit. Even Intel's 530 series, which has been on the more expensive side of mainstream products has been seen for just $140 for the 240 GB version here in the State.Regards,Christopher Ryan
  • -1 Hide
    venk90 , March 18, 2014 5:16 PM
    INSANELY GOOD DEAL ON AMAZON ! The 512 GB SSD is listed at 169$ incorrectly ! Grab them before they change it. I ordered 20 myself ! Will e-bay all of it or feel bad and return it to Amazon !
  • 3 Hide
    cryan , March 18, 2014 6:53 PM
    Quote:
    I just splashed $250 (delivered to Oz) on a M500 480GB mSATA, eh, can't complain.
    I hope Crucial continues to sell the M500 right where it is. The deals are just too good, and it'd be truly sad were Crucial/Micron to up the price on us.And they're not slow. I know it seems like they're sub par compared to some of the last few drives we've tested, but the reality is most users are never going to notice the speeds between different SSD models. The only exception is jumping from an older SATA II drive to a modern SATA III SSD. Even then, you'd need solid hardware in the system.Regards,Christopher Ryan
  • 0 Hide
    Ankursh287 , March 18, 2014 8:58 PM
    M500 available at $240 (amazon)..damn good drive for the price, performance difference between M500 , M550 & 840/840 pro won't visible to normal user.
  • 0 Hide
    Nada190 , March 18, 2014 10:55 PM
    When I look at SSD's I want price to performance because I won't even notice a difference.
  • 0 Hide
    Drejeck , March 19, 2014 2:56 AM
    Specifically for gaming which would be the best? All sort of tricks are allowed, from tweaks to samsung's magician (ram caching).
  • 0 Hide
    RedJaron , March 19, 2014 12:43 PM
    Quote:
    Of course, we're in the throes of post-launch pricing. In a few weeks, it's possible that the gap between M500 and M500 will narrow.
    Typo on the last page. One of those should be 550.


    Happy to see Crucial with this update. I'm with a lot of people, you don't see a difference in SSD performance outside benchmarks. Give me something reasonably fast with great durability and I'm sold. With all this talk of the maturing of 20nm manufacturing, I'd love to see an M500 V2 with less overprovisioning.
  • 0 Hide
    gizmoguru , March 19, 2014 2:29 PM
    Hay Tom's the chart for Sequential Reads Benchmark is labled "Random Writes", please correct
  • 0 Hide
    mapesdhs , March 19, 2014 7:05 PM
    I notice the PCMark Vantage graph's x-axis does not start at zero. This
    is very bad practice, please don't do it. The visual result is totally misleading.
    It makes the results look more differentiated than they really are.

    Ian.
  • 0 Hide
    game junky , March 20, 2014 6:12 PM
    I have had nothing but good experiences with Crucials M4s so this could be an exciting development depending on how they compete with Samsung. Keep 'em coming, guys
  • 1 Hide
    snakyjake , March 24, 2014 10:40 PM
    In terms of reliability and maintaining data integrity, how does this compare to SanDisk X210?
  • 0 Hide
    f s , March 29, 2014 4:29 AM
    M550 price doesn't match the performance unfortunately, $60 less would have made the difference.
  • 0 Hide
    cryan , April 1, 2014 11:00 PM
    Quote:
    In terms of reliability and maintaining data integrity, how does this compare to SanDisk X210?


    Most data integrity protocols for client/consumer SSDs are centered around maintaining data at rest. That is, once data is written to the flash, you want to minimize and counteract operations which can skew existing data. Things like Read Disturb Management fit this category, where reading one cell can affect the voltages of adjacent cells.

    That said, both drives have three year warranties. Both are made by fabbed SSD manufacturers, both have stakes in NAND foundries. Both use Marvell controllers and custom firmware/PCB packages. When SanDisk updates the X210 with the newer Marvell 9189, it's probably going to be awesome. The X210 is undoubtedly the most underrated drive in circulation. If you can get a good deal on one, it's probably the drive for desktop applications, assuming you want something that's been through its paces. The M550 is too early into its launch to know much about it yet, at least over more than a couple weeks.

    Regards,

    Christopher Ryan
  • 0 Hide
    frank5868 , April 14, 2014 1:24 AM
    Hi, Christopher
    Thanks for the nice review. I have some questions and wondering if you could offer some answers for them:
    Is the drive using AES encryption? 128 bit or 256 bit? How about the "Block cipher mode of action"? Is it ECB? CBC or XTS?
    Please dig as much as possible. I think the readers would be happy to be aware of the mode of action. As well known, the ECB isn't secure but the CBC or XTS is far better.

    Thanks.
    Frank
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