Western Digital WD Green 480GB

The Western Digital WD Green 480GB (SATA) is an entry-level, DRAM-less SSD typically pairing a Silicon Motion SM2258XT or SM2259XT controller with SanDisk BiCS 3D TLC NAND. Without a dedicated DRAM chip, the drive relies on a small SLC cache to manage incoming data, reaching peak sequential speeds only in short bursts and showing steep performance degradation once the SLC cache is saturated during large transfers. The drive prioritizes low power consumption and basic I/O servicing, and community teardowns note silent bill of materials revisions across batches. It also aggressively enters low-power DevSleep states, which helps laptop battery life but can cause latency spikes during wake-up on some desktops.

Key Specifications

• Interface: SATA III (6 Gb/s)
• Sequential Read: Up to 545 MB/s
• Sequential Write: Up to 515 MB/s (SLC Cache dependent)
• Controller: Silicon Motion SM2258XT / SM2259XT (DRAM-less)
• NAND Flash: SanDisk BiCS 3D TLC (Subject to revision)
• MTBF: 1,000,000 hours
• PCB Layout: 1/2 size or 3/4 size PCB inside a standard 2.5" housing

Hardware Alternatives

• SanDisk SSD PLUS 480GB: Acts as the internal hardware twin to the WD Green, often featuring identical controller and NAND combinations with only firmware-level differences between brands.
• Crucial BX500 480GB: A direct competitor in the DRAM-less SATA category, utilizing similar Silicon Motion controllers and differing thermal characteristics due to chassis design.
• Kingston A400 480GB: Serves as a market alternative typically using a Phison S11 controller, offering a similar performance tier with comparable limits on sustained write speeds and random I/O.