check with manufacturer to see if they have the drivers for windows 7. Sounds like the same problem with vista when it first came out. None of the hardware and software manufacturers had drivers for the OS yet. It took awhile but they eventually came out. This is one of my main problems with a unreleased OS (beta's, RC) and so on. MS sneaky way to get the consumer to do their work for them.
Operating System Windows 8 Pro
Computer Type Thermaltake OverSeer RX 1 fulltower
CPU Type and Speed AMD Phenom II X 4 965 BE
CPU Cooling Core-Contact 92 mm CPU Cooler
System Memory Type G-Skill 8 GB PC 8500
Video Card Type and Speed G-Skill 8 GB PC 8500
Power Supply Unit (PSU) Ultra X4 750 watt fully modular
Computer Monitor Dual Samsung SyncMaster S20B300
Hard Drive Seagate Barracuda 320 GB w/OS Seagate Barracuda 1 TB data storage
Computer Skill Level Self-Taught Expert