windows 7 won't let me change IRQ settings

I just installed a new ASUS P5N-D motherboard and have disabled the onboard sound, installed my C-Media PCI Audio Device and NVIDIA GeForce 9500 GT PCI-e video card and windows 7 ha assigned them both IRQ 16 and will not allow me to change the IRQ. When I am in a game that uses lots of graphics and sounds my computer freezes sometimes it will unfreeze after i let it set a minute other times have to do a hard restart. Any suggestions on how to get the IRQ's reset? I have uninstalled and reinstalled both.

• › Windows 7 won't let me open anything!!
• › dell HDD (windows 7) won't boot on my sys
• › Windows 7 won't shut down
• › my keyboard won't let me hit backspace
• › my compaq laptop with windows 7 won't boot up properly, whe
• › [Solved] My Computer Won't Let Me Log In
• › Satellite Windows 7 Won't Load