In this section we want to show you how much power is needed by the complete systems (without the monitor) equipped with the tested graphics cards. We measure the power consumption by means of the Corsair AX1200i power supply. The result is the sum total of the consumption of each system component. The PSU’s efficiency doesn’t affect it.
There are two test modes: idle and high load (FurMark 1.9.2 running in Burn mode in a 1280x720 window). We use FurMark for the high-load mode since, like most professional applications, it is based on OpenGL and is a heavy load indeed.
The Kepler architecture is an improvement on the Fermi in terms of energy efficiency, so it is no wonder that the new Quadro K5000 is much better than its predecessor in this test. Although generally faster, it is more economical both when idle and at high loads. In terms of official specs, the Quadro K5000 is about 20% more economical than the Quadro 5000. And as we can see in practice, replacing the old card with the newer one may help you reduce your workstation’s power consumption by an impressive 56 watts.
We can also note that the Quadro K5000 needs much less power than the gaming card with the same architecture. The GK104 seems to be suitable for energy-efficient products if its clock rates and voltage are not set too high. So, it is no problem that the Quadro K5000 has a simpler PCB design than the GeForce GTX 680. The professional card just doesn’t need a more advanced power system.