Tests with Discrete Graphics
You cannot usually expect platforms that have the same CPU, memory and graphics card but different mainboards to differ much in performance. Indeed, as you can see, the three mainboards are very similar, the Gigabyte 890GPA-UD3H enjoying but a very small advantage over its opponents. Take note that both AMD 890GX based products are generally faster than the AMD 785GX-based Gigabyte MA785GT-UD3H.
While the choice of a particular mainboard does not matter much in terms of system performance, it does influence the resulting power consumption of the computer.
The diagrams show the total consumption of each computer measured “after” the power supply. It is the total of the power consumption of all system components. The PSU's efficiency is not accounted for here.
The ASUS M4A89GTD PRO/USB3 is the most economical solution among the three tested mainboards. When under load, the computer with this mainboard consumes about 17% less power than the same computer with the Gigabyte mainboard. It is clear that the key system components are powered by the ASUS M4A89GTD PRO/USB3 in a more efficient way.