When the 7800GTX launched, the claim existed that although the GPU had more transistors and more horsepower, the 24-pixel pipelines allegedly did not consume more energy than the 6800 Ultra. This turned out to be true, and since then, we have wanted to see how all cards fair in the power usage field. All of the figures shown are the total power consumption of the entire system in watts. The first test gives us our baseline, which benchmarks a system without a graphics card. This provides a figure you can use to subtract out to get the actual figures.
Power Consumption - Boot And Idle
Power Consumption - Synthetics And Games