HP S750 1000GB

SSD Description

The HP S750 1000GB is a SATA III solid-state drive manufactured by BIWIN Storage Technology under license from HP, using a DRAM-less architecture designed to maximize density within the legacy AHCI protocol. The drive typically pairs a 4-channel Silicon Motion SM2259XT controller (or occasionally a Maxio MAS0902 variant) with 96-layer 3D NAND flash. Lacking a dedicated DRAM cache, the S750 relies on a pseudo-SLC caching strategy and internal controller SRAM to manage address mapping and burst write performance, allowing the drive to saturate the SATA 6Gb/s interface during sequential operations while using LDPC error correction to maintain data integrity. The S750 is subject to bill-of-materials variability; the specific NAND supplier (Micron, Intel, or YMTC) may fluctuate between production batches. As a DRAM-less drive, sustained file transfers that exceed the SLC cache capacity (dynamic sizing, usually 25-30% of free space) will see a sharp decline in write speeds down to native NAND speeds. This drive does not support TCG Opal encryption.

Key Specifications

• Interface: SATA III (6 Gb/s)
• Form Factor: 2.5-inch (7mm height)
• Controller: Silicon Motion SM2259XT (Reference)
• NAND Type: 3D NAND (TLC)
• Sequential Read: Up to 560 MB/s
• Sequential Write: Up to 520 MB/s
• DRAM Cache: None (DRAM-less)
• Endurance: ~650 TBW (Terabytes Written)
• Features: LDPC Error Correction, S.M.A.R.T. support, NCQ, TRIM

Hardware Alternatives

• Crucial BX500: This drive is the direct architectural equivalent to the S750. Both utilize the SM2259XT controller platform and a DRAM-less design, often resulting in indistinguishable random I/O performance and endurance ratings.
• TeamGroup GX2: A hardware clone in terms of the controller and NAND hierarchy. The GX2 frequently employs the same Silicon Motion reference design, offering a nearly identical throughput profile for sequential workloads.
• Samsung 870 EVO: While sharing the interface and form factor, the 870 EVO represents a different architectural tier. Unlike the S750, the 870 EVO includes a dedicated LPDDR4 DRAM cache and a proprietary Samsung controller, offering significantly higher sustained write speeds and random 4K IOPS.