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Samsung XP941 256GB Ultra M.2 PCIe SSD Review

By: Chris Ramseyer | SSDs in Storage | Posted: Sep 2, 2014 4:38 pm
TweakTown Rating: 92%Manufacturer: Samsung

Futuremark PCMark 8 Extended - Consistency Test

 

Version and / or Patch Used: 2.0.228

 

Heavy Usage Model:

 

FutureMark's PCMark 8 allows us to wear the test drive down to a reasonable consumer steady state and then watch the drive recover on its own through garbage collection. To do that, the drive gets pushed down to steady state with random writes and then idle time between a number of tests allows the drive to recover.

 

Precondition Phase:

1. Write to the drive sequentially through up to the reported capacity with random data.

2. Write the drive through a second time (to take care of overprovisioning).

 

Degradation Phase:

1. Run writes of random size between 8*512 and 2048*512 bytes on random offsets for 10 minutes.

2. Run performance test (one pass only).

3. Repeat 1 and 2 for 8 times, and on each pass increase the duration of random writes by 5 minutes.

 

Steady state Phase:

1. Run writes of random size between 8*512 and 2048*512 bytes on random offsets for 50 minutes.

2. Run performance test (one pass only).

3. Repeat 1 and 2 for 5 times.

 

Recovery Phase:

1. Idle for 5 minutes.

2. Run performance test (one pass only).

3. Repeat 1 and 2 for 5 times.

 

Storage Bandwidth

 

PCMark 8's Consistency test provides a ton of data output that we use to judge a drive's performance. Here we see the three states of performance for the select SSDs, light use, consumer steady state and worst case.

 

samsung_xp941_256gb_ultra_m_2_pcie_ssd_review_65

 

Just as the specifications show, the XP941 drives rate in performance by the capacity size. The 128GB is slower than the 256GB and the 256GB is slower than the 512GB. PCMark 8 is one of the few tests that companies can't fool with optimizations.

 

Storage Bandwidth All Tests

 

samsung_xp941_256gb_ultra_m_2_pcie_ssd_review_66

 

Here we see all of the tests combined on one chart. The XP941 256GB runs very close to the larger 512GB model through most of the tests.

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