We measured total system power consumption at the wall socket using a watt meter. The monitor was plugged into a separate outlet, so its power draw was not part of our measurement. The idle measurements were taken at the Windows desktop, and cards were tested under load running a loop of 3DMark05's "Firefly Forest" test at 1280x1024 resolution.
We used an Extech model 407727 digital sound level meter to measure the noise created (primarily) by the cooling fans on our two test systems. The meter's weightings were set to comply with OSHA standards. I held the meter approxiately two inches above the tops of the graphics cards, right between the systems' two PCI Express graphics slots.