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Samsung 850 Pro 256GB SSD Review

By: Chris Ramseyer | SSDs in Storage | Posted: Sep 29, 2014 9:15 pm
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TweakTown Rating: 94%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 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 ten minutes.

2. Run performance test (one pass only).

3. Repeat steps one and two, eight times, and on each pass increase the duration of random writes by five 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 steps one and two, five times.

 

Recovery Phase:

1. Idle for five minutes.

2. Run performance test (one pass only).

3. Repeat one and two, five 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 select SSDs, light use, consumer steady state, and worst case.

 

samsung_850_pro_256gb_ssd_review_64

 

The two highest performing consumer SSDs on the market at this time are the Samsung 850 Pro, and the SanDisk Extreme PRO. Depending on the capacity, these two go back and forth in our Consistency Test. This test wears the drives down, and then runs tests with five minutes of recovery time between each hour long test. A lot of data hits the drives. In this test the Extreme PRO 240GB does a bit better than the 850 Pro.

 

Storage Bandwidth All Tests

 

samsung_850_pro_256gb_ssd_review_65

 

If you write a lot of data to the drive at one time, and don't have a lot of recovery time, this is something to keep in mind. Most of us don't push this much data to a SSD this fast. Some enterprise workloads aren't even as stressful as the degraded and steady state tests. Most of our SSDs run between recovery one and recovery five, often shifting between these states depending on use. The 850 Pro does really well in these tests, but is a bit slower than some of the other drives in daily use software.

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