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AMD Radeon R7 240GB Gaming SSD Review - PCMark 8 Consistency Test


By: | SSDs in Storage | Posted: Aug 19, 2014 4:00 am
TweakTown Rating: 94%Manufacturer: AMD

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.

 

amd_radeon_r7_240gb_gaming_ssd_review_64

 

Under an intense workload, all of OCZ's current SSDs perform about the same. Even when the load is lightened, the OCZ (and new AMD) are very close to each other. There are faster drives on the market though.

 

Storage Bandwidth All Tests

 

amd_radeon_r7_240gb_gaming_ssd_review_65

 

Here we see all of the tests with the drive worn down and with the performance coming back after five minute breaks in between each run.

 

There are clear distinctions as the results form groups of drives. The OCZ group is just under the SanDisk Extreme II and Extreme PRO. The Samsung 850 Pro would also be in the SanDisk Extreme group, but we haven't test the 256GB model yet.

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