For testing power consumption, we took our test system and plugged it into a Seasonic Power Angel. For idle numbers, we allowed the system to idle on the desktop for 15 minutes and took the reading. For load numbers, we measured the peak wattage used by the system while running the game World in Conflict at 1600×1200 with medium graphics quality.
Power Consumption Results: Our power consumption chart is getting rather large, but since it doesn’t matter on the drivers, the numbers stay current as long as nothing on the test system changes. The XFX GeForce 9800 GX2 consumes more power at idle than the ATI Radeon HD 3870 X2, but just a little less at load while gaming.