Phison PCIe 4.0 SSD controller hits 4244.4MB/s write at CES

Phison demonstrated its new PS5016-E16 PCI Express 4.0 SSD controller at CES 2019. Legit Reviews saw the demonstration and reports that in combination with BiCS3 TLC NAND flash memory, a prototype of the new Phison controller was able to hit 4,071.9 MB/s sequential read and 4,244.4 MB/s sequential write on CrystalDiskMark 6.0.0. Phison says they currently achieve random 4k performance of 600,000 to 700,000 IOPS.

However, this is just the prototype. Phison believes they'll be able to hit much higher numbers:

As impressive as these results are from a 2TB SSD (CrystalDiskInfo was reading the capacity incorrectly), we were told it is just the beginning. Phison believes that they are going to be able to get up to around 4800 MB/s for sequential and 900,000 IOPS for Random 4K performance before this drive is ready for consumer use. Moving over to BiCS4 NAND Flash will help improve performance by 10% over BiCS3. Phison believes they can get about another 10% through firmware optimizations.