Power Consumption

One of Silicon Motion's design targets was a very power efficient controller, which is one of the reasons why they chose a custom RISC CPU instead of a general purpose ARM core and it looks like that has paid off. While the SM2246EN controller supports DevSleep, the SP610 for some reason does not. However, it still supports slumber power and the slumber power consumption is very competitive with other drives. Power consumption under load is also modest and stays below 3.5W.

SSD Slumber Power (HIPM+DIPM) - 5V Rail

Drive Power Consumption - Sequential Write

Drive Power Consumption - Random Write

Performance vs. Transfer Size Final Words
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  • nicolapeluchetti - Friday, June 27, 2014 - link

    Has anyone any idea on why the Samsung SSD 840 Pro is so bad in Anandtech Bench 2013 and so good in 2011? Here is the link it did 142 in 2013 http://www.anandtech.com/show/8170/sandisk-extreme... Nut in 2011 it's number 1 http://www.anandtech.com/show/8170/sandisk-extreme...

    How is this possible?I mean are the workloads so different?Did Samsung optimize the controller for the test?
  • WithoutWeakness - Friday, June 27, 2014 - link

    The 2013 Bench is definitely different enough to have different results for a given drive. More detailed info on the differences between the 2011 and 2013 benches can be found here: http://www.anandtech.com/show/6884/crucial-micron-...
  • Muyoso - Friday, June 27, 2014 - link

    Yea, I bought the 840 Pro on the basis of that 2011 test bench, and now everytime I see an SSD review I am sad to see how ravaged it gets vs the competition.
  • CrystalBay - Friday, June 27, 2014 - link

    I wouldn't worry about the 840P it still a top drive with excellent support . Come this September Samsung is going bring out some new drives. I'm very curious about what's next from them.
  • Kristian Vättö - Friday, June 27, 2014 - link

    Maybe September is coming sooner than you think ;-)
  • CrystalBay - Friday, June 27, 2014 - link

    Oh what a nice surprise ! can't wait....
  • Galatian - Saturday, June 28, 2014 - link

    Which answers my question wether I should get the XP941 now for my ASRock Extreme9 or wait ;-)
  • Khenglish - Friday, June 27, 2014 - link

    It has to do with how the 840Pro handles garbage collection. Basically the way the 2013 test is structured the 840Pro delays far longer than it should before reorganizing itself, but the 2011 test is less stressful in this regard. This means that the 840Pro is a very fast drive if you don't have it running at 100% at all times, but if you are then other drives are likely preferable.
  • althaz - Sunday, June 29, 2014 - link

    The 2013 test is more enterprisey. The 2011 test is a better indicator of performance if you half-fill your SSD and use it for your OS plus a few core apps. If you fill it up and use it for everything, the 2013 test is more useful.
  • nitro912gr - Friday, June 27, 2014 - link

    I can find the evo 840 250GB at the same price with that adata sp610, should I go with the later since it is bundled with the 3.5" case?
    I can't see much more difference aside that.

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