HD154UI is the Samsung Spinpoint EcoGreen F2 newest first model and 1500 GB of manufacturer, in this series "green" to boot. A Spinpoint F2 at 7200 rpm should be released shortly, but the timing of marketing makes obvious priorities of Samsung. If F2 Green Eco aim to improve the performance and consumption, the primary purpose is to provide greater capabilities: you start with a 500 GB model, which is separated only by a 1000 GB of our test model and its 1500 Go The two models are the highest capacity available with 16 or 32 MB of cache, while the 500 GB F2 EG confined to only 16 MB. Although a bit heavier than the F1 (650 grams), F2 EcoGreen has the same specifications (resistance to shocks of 70 G) and a similar level of consumption. As discussed a bit further with the listings, the consumption is even slightly higher than the Spinpoint EcoGreen F1. Nonetheless, this difference is slight, and the 500 GB of additional F2 EcoGreen compared to its predecessor gave him the advantage in perspective capacity per watt. Finally, remember that these drives are not designed for maximum performance, although they do very honorably Spinpoint T166 compared to 2007.