The Test

For each benchmark we measured performance as well as average power consumption during the course of the benchmark, finally reporting performance per watt as one divided by the other. Both Cool 'n Quiet and EIST were enabled on all processors.

CPU: Intel Core 2 Duo E6600 (2.40GHz/4MB)
AMD Athlon 64 X2 5000+ (2.6GHz/512KBx2)
AMD Athlon 64 X2 5000+ EE "Brisbane"
AMD Athlon 64 X2 4800+ EE "Brisbane"
AMD Athlon 64 X2 EE 4600+ (2.4GHz/512KBx2)
AMD Athlon 64 X2 EE SFF 3800+ (2.0GHz/512KBx2)
Motherboard: eVGA NVIDIA nForce 680i
ASUS M2N32-SLI Deluxe
Chipset: nForce 680i
nForce 590 SLI
Chipset Drivers: NVIDIA 9.53
NVIDIA 9.35
Hard Disk: Seagate 7200.9 300GB SATA
Memory: Corsair XMS2 DDR2-800 4-4-4-12 (1GB x 2)
Video Card: NVIDIA GeForce 8800 GTX
Video Drivers: NVIDIA ForceWare 97.44
Resolution: 1600 x 1200
OS: Windows XP Professional SP2

Idle Power Consumption

Power Consumption  

Brisbane Performance Issues Demystified: Higher Latencies to Blame Media Encoding Performance & Power Consumption
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