The 2TB Samsung 850 Pro & EVO SSD Review
by Kristian Vättö on July 23, 2015 10:00 AM ESTIdle Power Consumption
Since we truncate idle times to 25µs in our Storage Bench traces, they don't give a fully accurate picture of real world power consumption as idle power consumption is not taken properly into account. Hence I'm still reporting idle power consumption as a separate benchmark because it's one of the most critical metrics when it comes evaluating an SSD for mobile use.
Unfortunately I still don't have a way to test DevSleep power consumption due to lack of platform support, but my testbed supports HIPM+DIPM power commands (also referred to as Slumber power), so the results give a rather accurate picture of real-world idle power consumption.
Idle power consumption is increased by a rather large margin. With a beefier DRAM controller and more DRAM drawing power, I was expecting higher idle power draw, but not over twice the power. Still, the Pro and EVO are among the most power efficient drives under idle, making them good for mobile use.
ATTO - Transfer Size vs Performance
ATTO is a handy tool for quickly measuring performance across various transfer sizes and it's also freeware that can easily be run by the end-user.
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AS-SSD Incompressible Sequential Performance
Similar to ATTO, AS-SSD is freeware as well and uses incompressible data for all of its transfers, making it a valuable tool when testing drives with built-in compression engines (e.g. SandForce).
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leexgx - Thursday, July 23, 2015 - link
with the 2TB drive they should be good up to 2-6PB of written data at least (the 150-300TB is for warranty purpose past that they will not cover it) the Pro drive would be recommended if you know you're going to be doing lots of writes as tends to keep on going till it fails with 0 errors (EVO does not bold as well under mass data loads when exceeding its endurance spec)Topweasel - Friday, July 24, 2015 - link
In the worst case at 14nm with the 840 Pro they saw ~800TB of writing before they acted up. They should easily see more than that with 40nm MLC 3d nand. 300TB is great way to to beat everyone else at the warranted writes and still only offer a warranty that covers 10% on the low of its projected use allowance. The 2 TB version is probably good for damn near 10 PB of writes (could be a lot more not using a calculator to figure out its true longevity).fokka - Saturday, July 25, 2015 - link
since your average modern ssd will manage much more than 300tb anyways, upping the (guaranteed) durability from 150 to 300tb doesn't really take much and might as well be considered a marketing move. not that it's a bad development.Ubercake - Thursday, July 23, 2015 - link
Even without the 3D V-NAND tech, when Samsung upped the warranty to five years on their 850 EVOs (compared to 3-years on the 840 EVOs) and still kept prices competitive, I was sold on their drives. If a company backs any of this PC tech for five years (and even 10 years on the 850 PRO series!) or more, their on the short list for any of my builds.colinstu - Thursday, July 23, 2015 - link
the length of their warranties sold me too. I've been recommending them to friends to. One of those friend's 840 Pro however has been having some problems, attempting to do an RMA, Samsung only said they'd send out a refurbished drive (and never an upgraded model). This has put quite a sour taste in my mouth with Samsung (sadly). I don't know if Intel or others are any better with their RMA SSDs, but I sure hope so.hansmuff - Thursday, July 23, 2015 - link
It's common practice to send out refurbs for RMA replacement. For items under 30 days old, sometimes you can get a new replacement, depends on the manufacturer.What do you mean by upgraded model? Did he want an 850Pro for his 840 or something?
sustainednotburst - Friday, July 24, 2015 - link
did a RMA recently and in the email there was a notice that said they give New units within 90 days of purchase as long as you provide the proof of purchase.BillyONeal - Thursday, July 23, 2015 - link
To be fair, SanDisk did the 10 years thing first on the Extreme Pro; Samsung may just be responding to that. The number of drives returned for warranty, even among drives that actually fail, is likely extremely low.Impulses - Thursday, July 23, 2015 - link
Hmm, already got a 1TB EVO... Chances are I'll find a better deal (GB/$) on a second one by the end of this year than on the 2TB. I wish these had been out for a while already, if it were $700 or less already I would've picked one up instead of the 1TB I got recently (for $340). Trying to ditch HDD for anything but backups, but it'll come down to how much storage my photography ends up gobbling thru the year.melgross - Thursday, July 23, 2015 - link
The article is wrong about 1TB drives not being around at $1,000 and above. There were plenty of those drives.