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OCZ VX500 256GB, 512GB & 1TB SATA III SSD Review

By: Jon Coulter | SSDs in Storage | Posted: Sep 13, 2016 6:29 pm
TweakTown Rating: 93%Manufacturer: OCZ

Iometer – Maximum IOPS

 

Version and / or Patch Used: Iometer 2014

 

We use Iometer to measure high queue depth performance. (No Partition)

 

Max IOPS Read

 

ocz-vx500-256gb-512gb-1tb-sata-iii-ssd-review_36

 

Max IOPS Write

 

ocz-vx500-256gb-512gb-1tb-sata-iii-ssd-review_37

 

 

ocz-vx500-256gb-512gb-1tb-sata-iii-ssd-review_38

 

The VX500's take a step back in terms of max IOPS. With our configuration, we are able to hit factory max read IOPS specifications. We are not able to hit factory specs for write IOPS.

 

 

Iometer – Disk Response

 

Version and / or Patch Used: Iometer 2014

 

We use Iometer to measure disk response times. Disk response times are measured at an industry accepted standard of 4K QD1 for both write and read. Each test runs twice for 30 seconds consecutively, with a 5-second ramp-up before each test. We partition the drive/array as a secondary device for this testing.

 

Avg. Write Response

 

ocz-vx500-256gb-512gb-1tb-sata-iii-ssd-review_39

 

Avg. Read Response

 

ocz-vx500-256gb-512gb-1tb-sata-iii-ssd-review_40

 

ocz-vx500-256gb-512gb-1tb-sata-iii-ssd-review_41

 

Low read response was predictable, due to the low 4D QD1 read performance of the VX500. Write response is in line with the other SSDs in our test pool.

 

 

DiskBench - Directory Copy

 

Version and / or Patch Used: 2.6.2.0

 

We use DiskBench to time a 28.6GB block (9,882 files in 1,247 folders) composed primarily of incompressible sequential and random data as it's transferred from our DC P3700 PCIe NVME SSD to our test drive. We then read from a 6GB zip file that's part of our 28.6GB data block to determine the test drive's read transfer rate. Our system is restarted prior to the read test to clear any cached data, ensuring an accurate test result.

 

Write Transfer Rate

 

ocz-vx500-256gb-512gb-1tb-sata-iii-ssd-review_42

 

Read Transfer Rate

 

ocz-vx500-256gb-512gb-1tb-sata-iii-ssd-review_43

 

ocz-vx500-256gb-512gb-1tb-sata-iii-ssd-review_44

 

The VX500's delivered better write transfer rates than Crucial's MX300, and SanDisk's X400; as expected. All three of the VX500's read transfer rates are in line with Samsung's 850 EVO. The 850 Pro delivers the best read performance of the bunch.

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