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Samsung 840 Pro 256GB SSD Review - Benchmarks - Sequential Performance

Samsung 840 Pro 256GB SSD Review
In the enthusiast SSD market two products stand taller than the rest - the OCZ Vector and Samsung's 840 Pro. Today we're looking at the 256GB capacity size. Two drives enter, one drive leaves the champion.
By: | SSDs in Storage | Posted: Feb 14, 2013 7:56 am
TweakTown Rating: 94%Manufacturer: Samsung

HD Tune Pro

 

Version and / or Patch Used: 4.00

Developer Homepage: http://www.efdsoftware.com

Product Homepage: http://www.hdtune.com

 

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.

 

 

samsung_840_pro_256gb_ssd_review_52

 

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.

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