512GB Class Performance Testing
At this time, there are only two "next-generation" NVNe SSDs shipping, the SX8200 Pro we're testing today and the MyDigitalSSD BPX Pro, also in the charts.
We filled the charts with the other popular consumer 512GB-class NVMe SSDs shipping today with similar price points.
Sequential Read Performance
The 512GB ADATA SX8200 Pro raises the bar for queue depth (QD) 1 sequential read performance. The drive falls down the list at QD 2 but then moves quickly ahead of the other drives until QD 16, well outside of the normal consumer workload.
Sequential Write Performance
The drive matches the 480GB BPX Pro in QD 1 sequential write performance. The SX8200 Pro quickly reaches full performance by QD 2. The drive trails the Samsung 970 EVO in the burst test but only gives up around 250 MB/s.
Sustained Sequential Write Performance
All consumer SSDs utilizing 3-bit per cell flash also utilize advanced caching technology to increase burst performance. The SLC cache technology on modern SSDs is strong enough to absorb consumer-level random writes but as consumers, we often also transfer large sequential data. This can pose a problem when that data overruns the SLC buffer and the performance drops into native TLC write mode.
The ADATA SX8200 Pro writes all or nearly all data to the SLC area before moving it to the TLC flash. The SLC buffer writes at a very high speed but the size is dynamic, so it shrinks as you store more data on the flash.
Random Read Performance
We often talk about the importance of random read performance. We can link this often-overlooked area to the user experience. This is where Silicon Motion and partners focused tuning in the previous two product generations.
The ADATA SX8200 Pro random read performance chart shows the outcome of the intense focus on building a superior consumer SSD. The drive outpaces every other drive we've tested in this area other than those built using 3D XPoint memory (Intel's Optane).
Random Write Performance
The SX8200 Pro also provides users with superior random write performance at low queue depths. The two next-generation drives deliver just over 55,000 random write IOPS at QD1.
70% Read Sequential Performance
The single weak point we've found with the SX8200 Pro is the sequential mixed workload. The drive doesn't scale well as we ramp up the workload with reads and writes. The drive does deliver just over 1,100 MB/s. It would be difficult to push a consumer workload beyond this level, but workstation workloads can surpass this volume with multitasking and IO intensive applications.
70% Read Random Performance
The 512GB SX8200 Pro doesn't have a problem scaling with random mixed workload data. The drive leverages it's strong random performance to put forth equally strong mixed random performance.
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