Running a Win8 RTM build. I have an OEM XtremeMusic which worked with the same 1.25 drivers on Win7. The drivers installed OK but the device still is not recognized as no drivers are installed for it. I am not sure what information you need specifically, I have two unknown devices in Device Manager, I am guessing the one you need is "Multimedia Audio Controller" Device IDs: PCI\VEN_1102&DEV_0005&SUBSYS_10031102&REV_00 PCI\VEN_1102&DEV_0005&SUBSYS_10031102 PCI\VEN_1102&DEV_0005&CC_040100 PCI\VEN_1102&DEV_0005&CC_0401 Please let me know what else you would need. I am so excited to have my new system up and running with nice sound again! Thank you for all you do.