SLI has a shed load of problems , I have the
SLI setup and seldom use it because of problems with the nvidia drivers in SLI mode. If its realtek HD audio, well I have that and some of their drivers can cause blue screens and freezes, I had that with eve online until I changed the audio driver. In saying that I have no problems thus far running sins but my audio loops twice on the initial loadscreen then everything plays fine, I have a relativly new system as well and frankly am finding that alot of the drivers are still in their infancy and buggy as hell and knowhere near as stable as the companies would have you believe. Theres so many possibilities driver wise but a high chance of what the mod says as well.
I hope you get it fixed, its took me months of wading through buggy drivers to get my system stable.