Here's some interesting Socket AM2+ and AM3 details. On that note AMD wants to break even in Q4. Looks like AMD's Opteron is still more energy efficient than Intel's Xeon equivalent.

Neal Nelson said: "Based on tests at our independent lab, an AMD Opteron server is 7.3 to 15.2 percent more power efficient than a virtually identical Intel Xeon server at various transaction processing load levels."