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ADATA Ultimate SU800 SATA III SSD Review

By: Jon Coulter | SSDs in Storage | Posted: Dec 30, 2016 6:45 pm
TweakTown Rating: 89%Manufacturer: ADATA

Iometer – Maximum IOPS


Version and / or Patch Used: Iometer 2014


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


Max IOPS Read




Max IOPS Write






All three capacity points meet or exceed ADATA's factory specs. The SU800 is able to sustain high write IOPS for the entire 30 seconds of our test, which is something the planar-based SSDs in our test pool cannot do for more than a few seconds.



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




Avg. Read Response






The SU800's deliver better read response than Crucial's MX300 at all three capacity points. The 512GB model delivers better read response than the smaller capacity points. Although, its read response is still a distant second place to that of the 750 EVO.



DiskBench - Directory Copy


Version and / or Patch Used:


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




Read Transfer Rate






When testing write transfer rates, we have a rule of thumb. If any SSD cannot achieve 200 MB/s with our write transfer test, that SSD will not receive a TweakTown recommendation. Looking at the write transfer performance of Crucial's SM2256-powered BX200 shows us two things. First, we can see that SM2256 powered SSDs cannot meet our minimum requirement for receiving a TweakTown recommendation. Second, look at the massive write transfer performance coming the 256GB and 512GB SM2258-controlled SU800's.


SMI's new SLC caching scheme is so effective that it is able to write large blocks of data even faster than it can be read. This is a big time win for Silicon Motion.

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