Phison Showcases New PCIe 6.0 16-Channel X3 Controllerwith Sequential Speeds Up to 28 GB/s
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Phison Showcases New PCIe 6.0 16-Channel X3 Controller
with Sequential Speeds Up to 28 GB/s
At Computex 2026 in Taipei, Phison unveiled its next-generation PS5303-X3 PCIe 6.0 SSD controller — a 16-channel design targeting enterprise and data center markets — alongside a new DRAM-free PCIe 5.0 controller, the E37T, that delivers flagship-class performance at half the power draw.
Phison, a leading manufacturer of SSD controller chips, used its booth at Computex 2026 to showcase the PS5303-X3, its upcoming PCIe 6.0 flagship controller. The X3 is currently in the final stages of development and has been integrated into reference SSD designs — meaning Phison is ready to provide engineering samples to downstream SSD manufacturers for testing and qualification. According to Phison, engineering sample shipments to customers are scheduled to begin in December 2026, with volume mass production planned for mid-2027. Consumer SSDs based on this controller are expected to follow enterprise adoption, potentially arriving sometime after mid-2027.
The company also demonstrated benchmark results for its new DRAM-free PCIe 5.0 controller, the PS5037-E37T — a successor to the E27T that matches the performance of Phison’s DRAM-equipped E28 flagship while consuming roughly half the power.
PCIe 6.0 PS5303-X3: Key Specifications
The X3 is built around a 16-channel NAND architecture and uses a PCIe 6.0 x4 host interface, delivering approximately double the throughput of today’s top PCIe 5.0 SSDs. Phison targets sequential read/write speeds of up to 28 GB/s (28,000 MB/s) and random read/write performance of up to 6.8 million IOPS. The controller fully supports NVMe 2.3, OCP Datacenter NVMe SSD Specification v2.6, and a comprehensive suite of security features.
On power efficiency, Phison is targeting 4 GB/s per watt, which puts peak total power consumption at approximately 7W — a notable achievement given the controller’s throughput class. This makes it well-suited for AI infrastructure, cloud computing, and high-performance computing environments.
One of the most striking specifications is support for SSD capacities of up to 2 petabytes per drive — an enormous figure that reflects the controller’s data center DNA and positions it for large-scale AI storage workloads.
PCIe 5.0 PS5037-E37T: DRAM-Free Efficiency
Phison also showcased a working reference SSD based on the DRAM-free PS5037-E37T controller running on a laptop. The live demo recorded sequential read speeds of 14,239 MB/s and sequential write speeds of 12,307 MB/s — performance roughly equivalent to that of Phison’s flagship DRAM-equipped E28 controller. The drive is rated for up to 3 million random read/write IOPS, enabled by the use of 4800 MT/s BiCS NAND flash memory — top-tier chips not yet on the market but clearly approaching commercial availability given their use in live demonstrations.
The E37T is spec’d for a maximum throughput of 14.9 GB/s while consuming only 4.5W — a full 2.5W less than the DRAM-equipped E28. By eliminating DRAM, Phison reduces component costs at a time when DRAM prices are exceptionally high, offering cost savings to both Phison and downstream SSD manufacturers. The E37T is expected to begin shipping to customers later in 2026.
The E37T is likely to be offered to the consumer SSD market, meaning manufacturers could build consumer-grade drives based on this controller. Given current NAND and overall SSD supply conditions, early consumer products based on the E37T are likely to carry a premium price at launch.
