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Kingston SSDNow UV400 480GB SATA III SSD Review

By: Jon Coulter | SSDs in Storage | Posted: Nov 18, 2016 6:48 pm
TweakTown Rating: 89%Manufacturer: Kingston

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






The UV400 outperforms its factory specs considerably. Looking at write IOPS, we are getting 35K more IOPS than specified by Kingston. This leads us to believe that Kingston is giving us the specs for a preconditioned SSD.


This is admirable on their part. However, other manufacturers typically do not give maximum IOPS specifications on a preconditioned drive. Kingston may be selling themselves a bit short in this regard.



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 UV400 does quite well with this testing. It delivers the second-best read response and the second-best write response. Overall, this is a win for the UV400.



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


Windows 10




Server 2008




Read Transfer Rate


Windows 10




Server 2008






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. Quite a few SSDs have not been able to pass our litmus test. The UV400 did not deliver us our 200 MB/s minimum. This had us scratching our heads, mainly because other Marvell 88SS1074 controlled SSDs we've tested have all passed with flying colors.


Because of this, we decided to see what would happen when we ran this test on Server 2008 as part of our MOP testing. Much to our surprise, the UV400 delivered a sustained write transfer rate of 393 MB/s. We are at a loss as to why the UV400 delivers a 2.5x better write transfer rate on Server 2008, but because it does so, we will not disqualify the UV400 from receiving a TweakTown recommendation based on our 200 MB/s rule of thumb.

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