The RPM rating of the Green drives says “Intelipower *”. I could have sworn that at some point I found a detailed specification on wdc.com that explained what that meant and it said that the speed was variable between 5400 and 7200 rpm, but I am hearing reports now that testing indicates they are only 5400 rpm, and I can no longer find a reference stating they vary from 5400 to 7200. What is the deal?
Well, The link below have information about the Caviar Green RPM:
AFAICS, the information at that link is incorrect.
According to WD, IntelliPower is “a fine-tuned balance of spin speed, transfer rate, and caching algorithms designed to deliver both significant power savings and solid performance. For each drive model, WD may use a different, invariable RPM.”
This means that each model runs at a fixed speed. It is not variable. AFAIK, in the case of the Caviar Green the speed is 5400 RPM.