Phison E26 controller-based SSDs that use the PCIe Gen 5.0 standard have been introduced during the past few months. With the controller usually capable of hitting speeds of up to 13 GB/s, some of these SSDs will not hit that speed and will be limited to around 10 GB/s. This is because no 3D NAND chips are fast enough to saturate the controllers capabilities.
The bad news for the users is that some PCIe 5.0 SSDS will be limited to 10 GB/s, which is on the lower end of the expectations. This will surely produce a bottleneck as higher speed was a requirement.
The new PS5026-E26 controller from Phison has eight NAND channels that help varying transfer data rates, but a 3D NAND memory with a 2400 MT/s interface is required. It is also necessary to fill the newer PCIe 5.0 x 4 interface as this is crucial to push 3D NAND memory with the required interface to push PCIe 5.0 x 4 interfaces by transferring 15.754 Gbps of data to and from.
With the standard for consumer SSDs being eight NAND channels, it is anybody’s guess that they are not critical for common lower-level devices.
Via Tom’s Hardware