NAND Flash Will Restrict Transfer Rates Of Consumer PCIe Gen 5.0 SSDs To 10 GB/s

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.

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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.

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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