I had issues with Creative Fx Fatality Pro on Call of Duty, with blue screen and involuntary computer restarts on a ASUS Sabertooth 990FX motherboard.
I removed it and the drivers, returned it and not i have no problems. It was a very expensive card $150. It gave great sound, but unfortunately even with downloading the Win7 drivers there still was a conflict.
Any ideas on a cheaper sound card for great gaming performance?