Samsung 840 Pro 256GB SSD Review (Page 6)

| Feb 14, 2013 at 1:56 am CST
Rating: 94%Manufacturer: Samsung

HD Tune Pro

Version and / or Patch Used: 4.00

Developer Homepage:

Product Homepage:

HD Tune is a Hard Disk utility which has the following functions:

Benchmark: measures the performance

Info: shows detailed information

Health: checks the health status by using SMART

Error Scan: scans the surface for errors

Temperature display

HD Tune Pro gives us accurate read, write and access time results and for the last couple of years has gained popularity amongst reviewers. It is now considered a must have application for storage device testing.


Both the 840 and 840 Pro do very well when reading sequential data at QD1. Vector limits QD1 reads to around 350MB/s, but when the commands are stacked, the performance increases to around 500MB/s. The 840 and 840 Pro also increase performance when the queue depth is increased. We'll see higher NCQ writes in the CrystalDiskMark tests later in this review.

Samsung 840 Pro 256GB SSD Review 53 |

Here we see one of the large differences between the base 840 and the 840 Pro - write performance. The 840 Pro with MLC NAND writes much faster than the 840 with TLC. In this test using 64K size data, Vector enters 'storage mode' and slows halfway through the test. The low minimum speed isn't something you'll hit under normal use, but it does show up in our testing.

HD Tach - Sequential Write Performance After Random Writes

Samsung 840 Pro 256GB SSD Review 54 |

The Samsung 840 Pro still writes sequential data at an average speed of 395MB/s after being hit with a large amount of random writes. This is much better than the 840 Pro 128GB and 840 250GB.

Last updated: Apr 7, 2020 at 12:31 pm CDT

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Chris Ramseyer started his career as a LAN Party organizer in Midwest USA. After working with several computer companies he was asked to join the team at The Adrenaline Vault by fellow Midwest LAN Party legend Sean Aikins. After a series of shake ups at AVault, Chris eventually took over as Editor-in-Chief before leaving to start Real World Entertainment. Look for Chris to bring his unique methods of testing Hard Disk Drives, Solid State Drives as well as RAID controller and NAS boxes to TweakTown as he looks to provide an accurate test bed to make your purchasing decisions easier.

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