HD Tune PRO - Sequential Performance
Version and / or Patch Used: 4.55
We put together a nice collection of drives for the 1TB class charts today. The 840 EVO 1TB is missing, Samsung never sent one but we did have a 750GB model and included it in the charts. The other drives are all 1TB class with the SanDisk Extreme PRO 960GB next to the 850 Pro. In our Extreme PRO review, we determined that SanDisk produced the first hyper performance 1TB class SATA SSD. Hot on it's heels comes the new Samsung 850 Pro 1TB class SSD. For the most part, this will be a showdown between these two new, and very fast drives.
The Samsung 850 Pro 1TB delivered a solid performance when reading from the entire user LBA range. The average 64KB read was 469.6 MB/s with the maximum and minimum in very close proximity.
The 64KB write sequential write test shows why the SanDisk and Samsung 850 Pro products are in another league when compared to the other drives on the chart. The 850 Pro is a little faster here and delivers the same consistent performance as the Extreme PRO.
HD Tach - Sequential Write Performance after Random Writes
Version and / or Patch Used: 184.108.40.206
In years past, we've observed Samsung SSDs losing a lot of sequential write performance after a reasonable amount of random write load. The 850 Pro 1TB, and even the 128GB model does much better this time around.