Excerpt: The small ‘e' tacked onto this Phenom II's model denotes that it is an energy efficient CPU. Looking at the chip's maximum thermal design power (TDP) confirms this, as it is rated for a maximum consumption of just 65-Watts. When strapped into our test bed this processor proved to be a cool operator; it's idle and load temperatures were just 39- and 44-degrees Celsius, using a stock AMD cooler.
AMD Phenom II X4 905e CPU Reviewed – More Performance Without the Watts
6 October 2009
Summary: When one looks at the raw numbers, this CPU looks like it’s a bit too expensive. 2.5GHz processors are easy to come by and relatively cheap. The 905e requires explanation as to why it may be worth the dollar value placed on it. Requiring explanations like these tend to place products in a niche, which is where this CPU is headed. In looking around for a place that sells this CPU, I found Newegg had it deactivated.