1TB Class Performance Testing
We searched Amazon to find products priced close the new 1TB Addlink S70. You will find the $243 Samsung 970 EVO Plus (and original 970 EVO) off the list.
You will find seven mainstream and premium consumer SSDs with varying flash and controller technologies.
The MyDigitalSSD BPX Pro is a near twin to the addlink S70's hardware. The specifications are slightly different, but the core controller and flash are the same.
The rest of the products come with Silicon Motion, Inc. controllers. There is a mix of SM2262, newer SM2262EN, a lower-cost 4-channel model in the Intel SSD 660p and Crucial P1, both paired with 4-bit per cell memory.
Sequential Read Performance
The Phison E12 controllers don't like our test software for measuring sequential read performance. This has been an issue with the controller since we first started testing it prior to the official release. The low queue depth numbers are false. We generally ignore this test with this controller and use the mixed workload test to evaluate sequential performance.
Sequential Write Performance
We often talk about the divisions between SSD product classes. The chart above shows exactly what you pay more for, or in other terms, what you can get when you open the wallet a little more.
The addlink S70 joins the premium performance class in the sequential write burst test. At queue depth (QD) 2, the S70 outperforms the other drives.
Sustained Sequential Write Performance
The slight performance lead writing sequential data carries over to the sustained write test. The S70 has exceptional SLC mode writes with a generous size, then the performance drops off at a predictable rate for 3-bit per cell flash.
Random Read Performance
The 1TB Addlink S70 didn't fair well in the random read test at low queue depths. The drive uses Toshiba 64L TLC flash, so it's at a disadvantage to the drives using Micron's 64L TLC. The QD1 read with just over 12,000 IOPS is still a strong score that will increase desktop application performance for those moving from a SATA SSD.
Random Write Performance
We were surprised to find the S70 at the bottom of the random write chart while the MyDigitalSSD BPX Pro sat at the top. The drives are nearly the same, but there are a few key differences. The S70 doesn't overprovision the memory, and that can decrease performance later in the drive's life.
This is the first time we've been able to compare the overprovisioned Phison E12 against another E12 without the extra reservation of memory.
70% Read Sequential Performance
The Phison E12 is a very powerful controller with a processor and co-processor that allows the drives using the technology to performance complicated IO tasks quickly. We will see this carry over to the more stressful tests on the next page where we look at application performance.
70% Read Random Performance
The 1TB addlink S70 reaches a very high peak performance in a mixed random workload. The performance is a little underwhelming at lower queue depths, but it takes off at QD16 and above.