Phison PS5021-E21T: Next-Gen Efficiency Meets 5GB/s Performance
The Phison PS5021-E21T is a masterclass in balancing raw power with modern efficiency. As a PCIe Gen4x4 DRAM-less controller, the E21T utilizes a refined 12nm manufacturing process to deliver a staggering 25% improvement in performance-per-watt over previous generations.4 This makes it the premier choice for devices where space is at a premium and battery life is critical, such as the latest gaming handhelds, ultrabooks, and small-form-factor (SFF) builds.
By utilizing Host Memory Buffer (HMB) 3.0 technology, the E21T achieves performance levels that were previously only possible with expensive, power-hungry DRAM-based drives. With sequential read speeds hitting 5,000 MB/s, it provides the bandwidth necessary for rapid game loading, smooth 4K video playback, and lightning-fast system boot times.
Innovative Features for Modern Computing
- Advanced 12nm Efficiency: The move to a 12nm process allows the E21T to run significantly cooler than older Gen4 controllers, eliminating the need for bulky heatsinks in tight spaces.
- Handheld Gaming Hero: Thanks to its high performance and low heat, the E21T is the most popular choice for M.2 2230 SSD upgrades in devices like the Steam Deck, ASUS ROG Ally, and Lenovo Legion Go.
- HMB 3.0 Integration: Seamlessly uses a tiny portion of system memory to manage data tables, ensuring the drive stays snappy and responsive even during heavy file transfers.
- SRAM Error Correction: Features internal SRAM parity protection to ensure data integrity at the controller level, providing an extra layer of security for your most important files.
Technical Specifications
Feature | Detailed Specification |
Interface | PCIe Gen 4.0 x4 (NVMe 1.4) |
Max Sequential Read | Up to 5,000 MB/s |
Max Sequential Write | Up to 4,500 MB/s |
Random 4K Read/Write | Up to 780,000 / 800,000 IOPS |
Process Node | TSMC 12nm |
Controller Architecture | Single-CPU with Built-in CoXProcessor |
NAND Support | 3D TLC / 3D QLC (4 Channels, 16 CEs) |
Capacity Support | 128GB up to 4TB |
Security Support | AES-256, TCG Opal 2.0, Pyrite |
ECC Technology | Phison 5th Gen LDPC & RAID ECC |
Why the Phison E21T is the Smart Choice for Your Build
The PS5021-E21T is the perfect “no-compromise” mainstream drive. It offers nearly 10x the speed of a SATA SSD while maintaining a price point that makes high-capacity storage affordable. If you are looking for a reliable, high-speed upgrade that won’t overheat your laptop or drain your battery, the E21T is the most technologically advanced DRAM-less Gen4 controller on the market today.
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