ADATA Ultimate SU630 240GB

The ADATA Ultimate SU630 is an entry-level SATA drive that uses 3D QLC NAND and a DRAM-less architecture, typically paired with a Maxio MAS0902A controller. It relies on an intelligent pseudo-SLC caching algorithm to mitigate the slower native write speeds of QLC. Field analysis shows that once the dynamic SLC cache is exhausted during large transfers, sustained write throughput can drop sharply (often below 50 MB/s), and the specific 240GB model is noted as a "WORM" (Write Once, Read Many) candidate with lower TBW endurance compared to TLC-based drives.

Key Specifications

• Interface: SATA III (6Gb/s)
• Sequential Read/Write: Up to 520 MB/s / 450 MB/s
• Controller: Maxio MAS0902A (Typical configuration)
• NAND Type: 3D QLC
• DRAM Cache: No (DRAM-less)
• Features: LDPC (Low-Density Parity-Check) Error Correcting Code, SLC Caching

Hardware Alternatives

• Crucial BX500 240GB: Serves as an architectural analog; modern revisions frequently use QLC NAND with a DRAM-less controller, producing a similar performance and endurance profile.
• Samsung 870 QVO: Shares 3D QLC NAND technology but includes a dedicated LPDDR4 DRAM cache, improving random I/O performance and sustained stability.
• ADATA Ultimate SU650: ADATA internal alternative that typically uses 3D TLC NAND, offering higher native endurance and better sustained write speeds compared to the QLC-based SU630.