Its marvell9xxx whichever came with the asrock x79 Extreme9. However I think its my video card. One thing I forgot about was that it will sometimes make my mouse look all corrupted. Instead of the normal sized white with black trim. It was change to one of the other icons (like when you go to slide a window and you get the double arrow for stretching, or the hand). My music will keep playing but eventually my mouse curser will like a larger yellow and pink version that looks like its based off of some 8 bit color mapping. It's really wierd. I can still click on stuff, but the icon will be totally jacked until i reboot or something.