In interpreting the results on the boards, we see that the Dynamic Range and Noise Levels on the Asus P5N-E SLI are similiar to the ECS PN1 SLI2. Both are superior to the Foxconn 975X7AB as the greater the dBA the better. We can also see that when it comes to the THD and IMD percentages, the Foxconn comes out looking much better than both boards, since lower percentages mean better audio. Any of the boards audio will probably be fine for most people, even for gaming and movies. But if you are a die hard audiophile, you will likely get an add-on card for the best sound that is available.