Low power use will come at a price, however. Customers wishing to indulge in lower-power chips will have to cough up a $40 premium for the new chips on average, with "Energy Efficient" models costing between $26 and $52 more than the normal versions and "Energy Efficient Small Form Factor" flavors marked up as much as $61. Those premiums aren't anywhere near as high as those seen on the Opteron line, where low-power HE variants cost up to twice as much as regular Opterons, but they will nonetheless force some users to choose between speed and power utilization. The low-power Sempron 3000+ will cost more than all regular Sempron chips, for instance, and the low-power Sempron 3400+ will be more expensive than the regular Athlon 64 3200+. In the Athlon 64 X2 line, the "Energy Efficient Small Form Factor" Athlon 64 X2 3800+ will also cost more than the "Energy Efficient" X2 4000+ and nearly as much as the regular X2 4200+.
Aside from announcing low-power chips, AMD also slashed prices in the Athlon 64 line today. The Athlon 64 3500+ and 3200+ have dropped from $208 and $158, respectively, to $189 and $138. AMD also appears to have removed the Athlon 64 4000+ from its price list altogether.