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Samsung XP941 128GB PCIe SSD Review

By: Chris Ramseyer | m.2 SSDs in Storage | Posted: Aug 18, 2014 2:15 pm
TweakTown Rating: 86%Manufacturer: RamCity

Anvil Storage Utilities


Version and / or Patch Used: RC6


So what is Anvil Storage Utilities? First of all, it's a storage benchmark for SSDs and HDDs where you can check and monitor your performance. The Standard Storage Benchmark performs a series of tests; you can run a full test or just the read or the write test, or you can run a single test, i.e. 4k QD16.


Anvil Storage Utilities is not officially available yet, but we've been playing with the beta for several months now. The author, Anvil on several international forums, has been updating the software steadily and is adding new features every couple of months.


We can use Anvil several different ways to show different aspects for each drive. We've chosen to use this software to show the performance of a drive with two different data sets. The first is with compressible data and the second data set is incompressible data. Several users have requested this data in our SSD reviews.



0-Fill Compressible Data




Incompressible Data




The XP941 doesn't lose a lot of performance going from compressible to incompressible data.


We suspect the performance lost in the incompressible test is actually an increase in the background activity happening after the first test.



Low Queue Depth Read IOPS




Low queue depth random performance (measured in IOPS) is nearly identical for all three XP941 drives. With SATA drives we focus on QD1 performance but prosumer applications can ramp up the queue depth much easier than typical consumer applications.


High Queue Depth Read IOPS




Looking at the high queue depth random read performance, the 128GB model falls a bit behind the larger capacity XP941 drives. It's still quite a bit faster than the Plextor M6e, a M.2 PCIe x2 SSD that is also available on the market today.


Low Queue Depth Write IOPS




It's easier to achieve high queue depths when writing data to SSDs since the drives write a bit slower than they read and much of the data is random when a larger portion of reads are sequential.


The QD1 and QD2 random writes on all three XP941 drives are nearly identical, but once we get to QD4, the larger capacity drives still have performance to give, while the 128GB model start to drop off.


High Queue Depth Write IOPS




Oddly enough, the XP941 drives do not deliver the same high queue depth random writes that the M6e enjoys. The XP941 really drops off in this range, the brick wall effect happens right around 40K IOPS.

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