PNY CS900 2000GB

The PNY CS900 2000GB is a SATA III, DRAM-less 2.5-inch drive that pairs low-power controllers (common variants include Phison and Silicon Motion) with 3D NAND. It uses an SLC caching algorithm to sustain the advertised sequential speeds of 550 MB/s read and 530 MB/s write, saturating the SATA bus during burst workloads but depending on the controller’s garbage collection for sustained heavy writes. The model is known for variable hardware between batches (controller and NAND may change without SKU updates), with recent 2TB units more likely to use QLC NAND. The casing is predominantly plastic, providing less thermal dissipation than metal enclosures.

Key Specifications

• Interface: SATA III (6Gb/s)
• Sequential Read: 550 MB/s
• Sequential Write: 530 MB/s
• Controller: Variable (Phison PS3111-S11, S12, or SMI SM2259XT variants)
• NAND Type: 3D NAND (Variable TLC or QLC)
• DRAM Cache: None (DRAM-less)
• Form Factor: 2.5-inch (7mm height)

Hardware Alternatives

• Kingston A400: A direct architectural competitor that frequently employs the same Phison S11 controller logic and shares the variable BOM approach regarding NAND sourcing.
• Crucial BX500: Operates in the same DRAM-less tier; while it exclusively uses Micron NAND, the performance characteristics and reliance on SLC caching mirror the behavior of the CS900.
• TeamGroup GX2: Often utilizes a nearly identical reference design to the CS900, acting as a hardware clone in batches where both vendors source the same Phison controller revisions.