When introduced in mid-2006, Advanced Micro Devices" lineup of dual-core energy efficient processors with 65W thermal design power (TDP) consisted of just five models (3800+, 4000+, 4200+, 4400+ and 4600+) and the dated roadmap indicated that the only update to the family until Q2 2007 would be the 4800+ processor. At this point AMD"s lineup of Athlon 64 X2 chips with 65W TDP includes nine processor models (3600+, 3800+, 4000+, 4200+, 4400+, 4600+, 4800+, 5000+ and 5200+) with different specs and made using 90nm or 65nm fabrication process. AMD"s energy-efficient chips are priced from $102 to $232.
In addition, AMD ships six processor models for applications that require power consumption as low as 35W, two processors that fit into 45W thermal envelope, two chips for previous-generation socket 754 platform with 51W and 59W TDP as well as tens of chip models with typical thermal power of 62W. Unfortunately, the company does not indicate thermal design power of its processors within the model number, making the information harder to find for end-users and system integrators seeking low-power chips.