ADATA Ultimate SU630 480GB

The ADATA Ultimate SU630 480GB is built on a DRAM-less architecture that leverages high-density storage using 64-layer 3D QLC NAND flash. The drive is managed by the Maxio MAS0902A controller, which employs Low-Density Parity-Check (LDPC) error correction and relies on an allocated SLC caching zone to maintain rated sequential speeds. Without a dedicated DRAM cache, the SU630 prioritizes storage density over sustained I/O consistency. The unit uses a polymer casing, which provides less thermal mass for heat dissipation, though the controller's thermal output rarely necessitates aggressive cooling.

Key Specifications

• Capacity: 480GB
• Interface: SATA III 6Gb/s
• Sequential Read/Write: Up to 520 MB/s Read / 450 MB/s Write
• Controller: Maxio MAS0902A
• NAND Flash: 64-layer 3D QLC (Quad-Level Cell)
• DRAM Cache: None (DRAM-less)
• Endurance: 100 TBW (Total Bytes Written)
• Feature Support: LDPC ECC, SLC Caching, SMART support

Hardware Alternatives

• Crucial BX500 480GB: A direct competitor in the DRAM-less SATA tier; newer manufacturing batches frequently utilize QLC NAND similar to the SU630, resulting in comparable sustained write limitations.
• Samsung 870 QVO: Shares the QLC NAND architecture but differs in controller design; includes a dedicated DRAM cache and a proprietary Samsung controller, offering higher random I/O performance than the SU630 despite the shared cell type.
• ADATA SU650 480GB: The immediate hardware relative within ADATA’s stack; historically a TLC-based drive, with the SU630 serving as the dedicated QLC variant and having lower endurance ratings compared to confirmed TLC drives.