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Samsung XP941 512GB M.2 PCIe SSD Review

By: Chris Ramseyer | SSDs in Storage | Posted: May 20, 2014 7:18 pm
TweakTown Rating: 92%Manufacturer: RamCity

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.

 

samsung_sp941_512gb_m_2_pcie_ssd_review_60

 

In the PCM8 Consistency test, we see the best and worst case performance over a duration of time. The middle result shows recovery after a five minute pause after heavy disk activity. The Samsung XP941 512GB recovers well and delivers significantly more throughput in real-world conditions when compared to the EVO and Pro SSDs.

 

Storage Bandwidth All Tests

 

Here we see all of the tests plotted on the same chart. This shows the drive from worst case to steady state to recovery performance.

 

samsung_sp941_512gb_m_2_pcie_ssd_review_61

 

Here we see all of the tests lined up in the same graph to see the stages of performance. The XP941 is easy to spot; it delivers the highest performance all the way across the chart. The drive wears down, but the performance doesn't drop as low as many other drives on the market.

 

Some drives have a real issue with degraded state flash, including some of Samsung's offerings. We were honestly surprised to see the XP941 do so well across the chart, but the fact is it delivered amazing performance.

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