In this part of our review we are going to show you the power consumption readings we took off complete systems (without the monitor) equipped with different professional graphics accelerators and connected to an electric outlet. The measurements were performed in idle mode as well as under heavy load - during FurMark 1.6.5 test in “Burn” mode in a 1280x1024 window. Like most professional applications this test uses OpenGL and creates substantial load for the video subsystem.
Among the low-end accelerators the most energy-efficient ones are AMD solutions as they are based on more energy-efficient GPUs manufactured with 55 nm process instead of 65 nm process. However, top professional graphics cards from Nvidia using GT200b chip can compete successfully with their rivals not only in pure performance but also in performance-per-watt. And even larger amounts of graphics memory on professional Nvidia solutions from the premium price category barely affect their power consumption.