Reviews of the Seagate ST3320313AS Hard Drive. Seagate ST3320313AS—a storage device that belongs to a specific era and occupies a distinct position in the market. Whether this is a brand-new mainstream drive or a decades-old retro component, our goal remains the same: to evaluate it fairly within its intended context. We will examine its physical specifications, interface compatibility, real-world transfer performance, acoustic behavior, thermal output, and long-term reliability considerations.
The Seagate ST3320313AS is a 320GB 3.5-inch internal hard disk drive designed for budget-conscious desktop users and entry-level storage tasks. It utilizes a 7200 RPM spindle speed and a SATA 3.0 Gb/s interface, positioning it as a basic mechanical drive for secondary data storage, operating system installation on older systems, or as a low-cost upgrade for repurposed office computers.
Core specifications include a formatted capacity of 320GB, a 16MB cache buffer, an average seek time of approximately 8.5 milliseconds, and a sustained data transfer rate of around 125 MB/s under optimal conditions. The drive features a standard 3.5-inch form factor and consumes roughly 7 watts during active read/write operations, with idle power draw near 5 watts.
In performance benchmarks, this model delivers sequential read speeds averaging 110-120 MB/s and write speeds of 100-110 MB/s, which are typical for a single-platter 7200 RPM drive from its generation. Random access latency hovers around 12-14 milliseconds. It is not designed for high-demand workloads; large file transfers and boot times are notably slower compared to modern SSDs or hybrid drives.
Primary advantages include low cost per gigabyte, sufficient capacity for basic document storage, music libraries, or as a secondary backup drive, and reliable mechanical operation within standard temperature ranges. It also provides predictable performance for non-intensive tasks and is widely supported by older motherboards with SATA 2.0 or 3.0 ports.
Significant drawbacks include mechanical latency that leads to sluggish random I/O performance, high power consumption relative to SSDs, sensitivity to physical shock, and audible noise during seeking operations. The 320GB capacity is insufficient for modern gaming libraries, large media collections, or current operating systems with frequent updates. It is also prone to fragmentation and performance degradation over time.
This drive is best suited for secondary data storage in legacy desktop computers, archival backups of small datasets, or as a boot drive for lightweight Linux distributions on older hardware. It is not recommended as a primary drive for Windows 10 or 11, video editing, gaming, or server environments where low latency and high throughput are required.
For purchase consideration, this drive is only viable if obtained at a very low price (under $15 USD) for a specific legacy use case, such as repairing a 2010-era desktop. Most users will benefit more from a modern 120GB or 240GB SATA SSD for similar or slightly higher cost, which offers dramatically faster boot times, silent operation, and better reliability. If you require traditional magnetic storage for bulk archival, a 1TB or larger 5400 RPM drive may provide better value per dollar.