Sign in with
Sign up | Sign in

Benchmark Results: 4 KB Random Performance

Samsung 840 Pro SSD: More Speed, Less Power, And Toggle-Mode 2.0
By

We've tested a ton of SandForce-based SSDs, and we know that drives utilizing the same NAND interface perform similarly, regardless of brand. As a result, we're representing SandForce's second-gen controller by publishing results from OCZ's Vertex 3, which is analogous to Intel's SSD 520 and Corsair's Force GT. All three drives employ synchronous memory.

We're also preconditioning each SSD prior to random and sequential read testing. This helps us address a potential issue whereby a drive's flash translation layer could return a read request without actually accessing data after a secure erase. This should help put our SSDs on a more level playing field.

Random Read Performance (background info)

Examples include antivirus scans and typing in Word

At a queue depth of one, nearly every SSD delivers ~20 MB/s in random reads. However, as we scale up to four outstanding I/O requests, we start to see the results spread out a bit. The 840 Pro continues to distinguish itself at a queue depth of 16, though, and starts to approach 400 MB/s (or nearly double the speed of Crucial's 256 GB m4 and OCZ's 240 GB Vertex 3).

Just as important, the 840 Pro delivers a nearly-30% performance increase over the 830. We couldn't get Samsung to get specific about a lot of what's going on under the hood, but the company certainly does appear justified in designating a new high-end SSD based on the changes it made.

Random Write Performance

Examples include email, file compression, and Web browsing

The lines are bunched closer together and intersect more often in our random write test. Every SSD delivers between 60-70 MB/s at a queue depth of one. At a queue depth of four, the field spreads out, but then mixes up a bit during the increase to seven outstanding commands. By then, Samsung's 840 Pro takes the lead, delivering ~350 MB/s (~90 000 IOPS). It remains there all the way through the rest of the test.

In the past, we've seen Samsung's drives perform poorly in random write tests. It was an issue for the 470, and we saw it again from the 830, which hangs toward the bottom of this chart. The fact that the 840 Pro rectifies this means the biggest weakness from previous generations is being addresses effectively.

Ask a Category Expert

Create a new thread in the Reviews comments forum about this subject

Example: Notebook, Android, SSD hard drive

Display all 44 comments.
This thread is closed for comments
Top Comments
  • 27 Hide
    mayankleoboy1 , September 24, 2012 12:15 PM
    Despite what the judges believe, Samsung is a great innovator. Unlike some fruity companies, that basically license other companies tech....
  • 23 Hide
    mayankleoboy1 , September 24, 2012 12:09 PM
    Kudos to Samsung for getting ahead of the competition yet again. And the complete SSD is designed and manufactured in house! And thay are sure of its reliability, hence the 5 year warranty.

    I dont see why it did not get a Toms approved award.... its faster, uses less power, and offers better warranty than the competition. And the firmware is also stable, unlike SF.
  • 21 Hide
    willard , September 24, 2012 2:48 PM
    pocketdrummerThey keep increasing the speed, but they do nothing to reduce the COST.

    SSD prices are the lowest they've ever been and are dropping at a very rapid pace. Last year $1 per GB was unheard of, now you can find SSDs as cheap as $.60/GB and mainstream drives have been under $1 for a while. Only the top of the line drives are still more than $1/GB.

    Quote:
    It's still pointless for someone like me who has over 1.5TB of space used.

    4TB and growing, and I get plenty of use out of my SSD. People who claim SSDs are pointless for them are people who don't understand how they should be used. Leave your data on an HDD, and put the OS on the SSD.

    Quote:
    I can't load Windows and all of my critical programs on a 256GB SSD, and the 512GB wouldn't give me much wiggle room. Not to mention my sample libraries that would benefit from the speed... that are hundreds of GB each.

    Forget loading your hundreds of GB of data files onto an SSD. Decent mechanical drives in RAID 0 perform nearly as well in sequential reads, which is what reading in your samples would be.

    Sounds like you need to stop complaining and start using the right tool for the job.
Other Comments
  • 23 Hide
    mayankleoboy1 , September 24, 2012 12:09 PM
    Kudos to Samsung for getting ahead of the competition yet again. And the complete SSD is designed and manufactured in house! And thay are sure of its reliability, hence the 5 year warranty.

    I dont see why it did not get a Toms approved award.... its faster, uses less power, and offers better warranty than the competition. And the firmware is also stable, unlike SF.
  • 9 Hide
    mayankleoboy1 , September 24, 2012 12:10 PM
    Where are the TRIM efficiency tests ?
  • 27 Hide
    mayankleoboy1 , September 24, 2012 12:15 PM
    Despite what the judges believe, Samsung is a great innovator. Unlike some fruity companies, that basically license other companies tech....
  • 4 Hide
    willyroc , September 24, 2012 12:35 PM
    Wow, Samsung was ahead of competitors with its 830 due to superior performance and low prices. Now I bet the 840 has, (or will) widened that lead.
  • 10 Hide
    Anonymous , September 24, 2012 12:58 PM
    So it's the Samsung 840Pro 256GB for C:, and it's the Seagate single-platter 1TB drive (ST1000DM003) for storage. Awesome awesome combo.
  • 8 Hide
    sherlockwing , September 24, 2012 1:10 PM
    Gah, 1 month after I get the 830 now comes the 840 Pro who gets another 120 mb/s in extra speed.
  • 14 Hide
    mayankleoboy1 , September 24, 2012 1:19 PM
    sherlockwingGah, 1 month after I get the 830 now comes the 840 Pro who gets another 120 mb/s in extra speed.


    Thats technology growth for you :D 
  • 9 Hide
    aicom , September 24, 2012 1:36 PM
    Well this makes my new SSD decision much easier.
  • 2 Hide
    sherlockwing , September 24, 2012 1:42 PM
    To those that complain about SSD life span, the truth is that in 3 years(typical warranty of an SSD) you won't be using the same SSD because the new SSD will be 40-50% faster. 3 year from now I'd be using the 860 Pro with anyway and when an SSD reach end life it just can't write anymore, you can still read all the files onto your new SSD unlike a hard drive that just breaks down.
  • 0 Hide
    Old_Fogie_Late_Bloomer , September 24, 2012 2:22 PM
    So glad I didn't pull the trigger on a 830 yesterday...I came this close. For the performance gains of the 840 Pro, I can wait.
  • 21 Hide
    willard , September 24, 2012 2:48 PM
    pocketdrummerThey keep increasing the speed, but they do nothing to reduce the COST.

    SSD prices are the lowest they've ever been and are dropping at a very rapid pace. Last year $1 per GB was unheard of, now you can find SSDs as cheap as $.60/GB and mainstream drives have been under $1 for a while. Only the top of the line drives are still more than $1/GB.

    Quote:
    It's still pointless for someone like me who has over 1.5TB of space used.

    4TB and growing, and I get plenty of use out of my SSD. People who claim SSDs are pointless for them are people who don't understand how they should be used. Leave your data on an HDD, and put the OS on the SSD.

    Quote:
    I can't load Windows and all of my critical programs on a 256GB SSD, and the 512GB wouldn't give me much wiggle room. Not to mention my sample libraries that would benefit from the speed... that are hundreds of GB each.

    Forget loading your hundreds of GB of data files onto an SSD. Decent mechanical drives in RAID 0 perform nearly as well in sequential reads, which is what reading in your samples would be.

    Sounds like you need to stop complaining and start using the right tool for the job.
  • 11 Hide
    freggo , September 24, 2012 3:11 PM
    pocketdrummer...pointless for someone like me who has over 1.5TB of space used


    You are not painting the greatest geek picture of yourself here :-)
    You must have heard that it is a good idea to have at least 2 drives, one OS and crucial programs and one or more Data drives?
    Photoshop even kindly points out that it prefers a separate scratch disk.

    I use a 90GB SSD and 2TB data drive and that works just fine with Win7/64, full Photoshop/Premiere install and a few choice other things; and still have some 30GB left over.
  • 4 Hide
    frombehind , September 24, 2012 3:39 PM
    pocketdrummerIt's still pointless for someone like me who has over 1.5TB of space used.



    I have over 30 TB of "data" sitting on an enterprise class NAS, that everyone on my network uses for extra storage and to access content.

    My PC does everything I need to do with 2x 256 GB SSD drives, and I am sure after using it for a year... that anyone else's can too.

    Upgrading both my drives to 2 of these 840 512gb drives would be huge boost ^^
  • 6 Hide
    jaquith , September 24, 2012 3:55 PM
    Don't get me wrong, I like Samsung SSD's but ~30% more expensive it's a tough choice, and for now I'd choose the OCZ Vertex 4. The real world in 4KB (most OS/Apps) doesn't justify it's price. Hopefully the prices I ran across are incorrect, but here's what I've found:

    Samsung SSD 840 Pro Pricing:
    $99.99 64GB, $149.99 128GB, $269.99 256GB, $599.99 512GB.

    Samsung SSD 830 Pricing:
    $74.99 64GB, $139.99 128GB, $219.99 256GB, $569.99 512GB.

    OCZ Vertex 4 Pricing:
    $49.99 64GB, $99.99 128GB, $199.99 256GB, $399.99 512GB.
  • 8 Hide
    warmon6 , September 24, 2012 4:11 PM
    pocketdrummerOnce you can get 512gb for under $200 and have a life span that gets close to a decent HDD, then you can expect an award.


    Well, it seams samsung is doing a decent job on getting there. heck, In this article they even mentioned about there personal experiences with the 470

    Quote:
    We run Samsung 470s in all of our test beds in Tom's Hardware labs around the world, and not one of them has suffered any sort of failure.


    and the first ones launched about 2 years ago. So I'm just a few of those test beds has those early models. ;) 

    pocketdrummerThey keep increasing the speed, but they do nothing to reduce the COST.


    Oh really? For the samsung 830 128GB I have, (if I bought it) it would of cost $200 to $250 when it first came out. (got my SSD through the samsung giveaway many months back, so I dont remember exact price of it at the time, other than it was above $200.)

    From the samsung 830 review
    Quote:
    We're told that the 128 GB 830-series drive should sell for $250. That’s a little under $2 per GB (right in line with OCZ's 120 GB Vertex 3).


    http://www.tomshardware.com/reviews/samsung-830-ssd-toggle-mode,3034.html

    So with the info from above, a samsung 830 128GB cost about $140 now and when it launched a year ago, i cost over $200.... They haven't reduced the cost at all?

    Lets rethink that about that. ;) 

    (and thats just from samsung, I haven't looked at the other guys. Although knowing how companies react to each other that's in the same market, I'm pretty darn sure that i'll see the exact same trend.)

    pocketdrummer It's still pointless for someone like me who has over 1.5TB of space used. I can't load Windows and all of my critical programs on a 256GB SSD, and the 512GB wouldn't give me much wiggle room. Not to mention my sample libraries that would benefit from the speed... that are hundreds of GB each.


    Something fishy with your thinking or something :heink: 

    No matter what kind of job you can do with a computer, I've never heard of someone that would need 512GB of storage just for their critical programs or if they did, it wasn't critical enough to need the speed of an SSD (and with all the people i've hanged out with on the forums, I know there plenty of guys in there that really do use there storage systems to the limit (both speed and storage) by there jobs/activites).

    Now if your combining progams WITH anything you save. Then that's a different story.

    Although if that's your thinking then as Freggo and willard pointed out, For how long you been here, you should of know by now that you need would need to pick the right things for the job and truly figure out what needs the speed benefit of an SSD. (not every "critical program" needs the speed boost of an SSD. )
  • 6 Hide
    ikyung , September 24, 2012 5:03 PM
    Once you go SSD, you can't go back.
  • 7 Hide
    acku , September 24, 2012 5:22 PM
    sherlockwingGah, 1 month after I get the 830 now comes the 840 Pro who gets another 120 mb/s in extra speed.


    Such is the life of an early adopter. :) 

    Cheers,
    Andrew Ku
    Tom's Hardware
  • 2 Hide
    mayankleoboy1 , September 24, 2012 5:38 PM
    jaquithDon't get me wrong, I like Samsung SSD's but ~30% more expensive it's a tough choice, and for now I'd choose the OCZ Vertex 4. The real world in 4KB (most OS/Apps) doesn't justify it's price. Hopefully the prices I ran across are incorrect, but here's what I've found.


    The difference is Vertex4 has performance dependent on the capacity filled. Plus, OCZ are known to release not fully tested firmware. With Samsung, the firmware is rocksolid.
  • 4 Hide
    jaquith , September 24, 2012 5:50 PM
    sherlockwingGah, 1 month after I get the 830 now comes the 840 Pro who gets another 120 mb/s in extra speed.

    Real World - you won't be able to tell the differences, most tasks <1 second, install a 7GB game <15 seconds. So if you're a 'Borg' then maybe...
Display more comments