Sequential Read Performance
SSDs based on the Phison E12 controller don't play well with our sequential read test. These drives show low performance in queue depth (QD) 2 and 4. We've had the same issue with some of Intel's early NVMe SSDs.
The Cardea II shows the same low performance at QD2 and QD4, but this isn't an issue with the drive per se. In other software, the numbers are much higher. The Cardea II does reach peak performance of 3,500 MB/s at higher queue depths.
Sequential Write Performance
Our 512GB Cardea II surpasses 2,000 MB/s in our sequential write test. The drive only dips below that number at QD1, but there is very little roll-off at low queue depths.
Sustained Sequential Write Performance
The sustained sequential write performance leads all of the other drives in the chart today. This is in part due to the extruded aluminum cooler. The newer firmware also helps the drive sustain very high throughput as we write to the entire drive with 128KB sequential data.