Numerous sites have speculated that the Caviar Green essentially runs at 5,400RPM, and now even Western Digital has changed its tune. Sort of. The drive's latest spec sheet lists the Green's rotational speed as "IntelliPower," which WD defines as "A fine-tuned balance of spin speed, transfer rate and caching algorithms designed to deliver both significant power savings and solid performance." So much for clarification.
Western Digital obviously doesn't want customers making assumptions about the Caviar Green's performance based on rotational speed alone, but the decision to obfuscate it behind blatant marketingspeak is entirely unnecessary and evasive. After all, the market isn't short on examples of drives with slower spindle speeds outperforming faster ones. Some websites even cite the benchmarks showing Western Digital's own 5,400-RPM Scorpio Blue beating Seagate's 7,200-RPM Momentus in some tests. Consumers deserve a little more credit. Those nerdy enough to dig through data sheets or online reviews to find a drive's spindle speed are going to know that it's not the only factor that dictates performance.
Obviously, the Caviar Green is a poor choice if you're looking for a lightning-quick storage solution. It may be fast enough for basic desktop tasks, but it's much slower than the fastest terabyte drives on the market. The Green is really designed for applications that favor low power consumption and silent operation over raw performance. In its domain, it excels. If you're building a power-efficient home theater PC or closet file server, or even if you're looking to add secondary storage to an existing desktop, this latest Caviar Green should be at the top of your list.