Lower RPM drives tend to be quieter and more efficient, while higher RPM drives have better performance. The RPM value impacts sequential transfers as well as random access latency. We only recommend conventional magnetic recording (CMR) drives and not shingled (SMR), as the latter comes with performance and operational caveats.įor performance, HDDs are also often gauged by rotations per minute (RPM), which is usually a direct indicator of performance. There are a few potential performance pitfalls when buying a new HDD, and the type of recording technology is one of the most important factors. If you're shopping for an HDD, you’re probably looking for the lowest possible cost per TB, but you should consider performance and support for certain applications. The ubiquitous SATA interface is used for desktop PCs, and most motherboards have ample available ports, which makes expansion easy. Otherwise, your computer case’s ability to house a certain number of 3.5” drives might be your primary limitation. If you need 2.5”, your options are more limited, especially for capacity. It is important to be aware of the drive’s form factor, with 3.5” being the most common for the best HDDs (this is the only type we cover). Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you.
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