According to my cheap outlet power meter, an UltraZed-EG+IOCC booted to the demo petalinux prompt draws 7.9W from the wall (with nothing but the console USB connected). Loading each core to 100% adds an additional 0.2W/each. Brining up 1000Base-T adds 0.4W
Can anyone guess where most of that 7.9W is going? When I use the Xilinx power estimator I can't get a number higher than ~3W, so either I am using that tool incorrectly or the majority of the power is used by peripherals.