Nice mate,
well in the BIOS of my Sabertooth I have settings to lock the PCI slots to a certain speed/spec eg 2.0 or 3.0. I have mine set to 3.0, and I also have a setting for the on-board Intel Graphics which I changed from auto to PCI-E. There was a setting for Intel HD Audio which I set to off.

I would also make sure you are on the latest motherboard BIOS and you have the latest Intel Chipset Driver (Inf).
Are you running a 120Hz monitor? There still seems to be problems with them.

Have a look through the Official NVIDIA Thread for these drivers, there bound to be others with the same issues.

Quote From thread
Providing Feedback:
Please feel free to leave feedback for any driver related issues specific to this driver. By providing your information here, you may also help others who may be experiencing the same issue you are. The more information we receive from you and others, the easier it will be for us to reproduce this issue in our labs and provide a fix through a future driver. Alternately, you may provide this same information through our NVIDIA Display Driver Feedback Form below:

http://surveys.nvidia.com/index.jsp?...f07694a40f8ac6

Please provide the following information as best you can:

1) Graphics card/GPU make and model:
2) Is this a driver regression? If yes, what was the last driver version which did not have this driver bug?
3) Operating System:
4) Is your graphics card manually overclocked/factory overclocked? If your graphics card is factory overclocked or manually overclocked, we recommend that you lower the clock speeds of your graphics card to NVIDIA reference clock speeds and then make another attempt to reproduce the issue you are encountering. For graphics cards which are factory overclocked, you may use a 3rd party utility such as eVGA Precision or MSI Afterburner to adjust the clock speeds of your graphics card. Our NVIDIA Products page lists the NVIDIA reference clock speeds for each of our GPUs.
5) If your issue is specific to a game or application, please provide the title and if possible version of the software
6) Describe the display driver issue you are encountering and if possible include step by step instructions on how to reproduce this bug. Please use the knowledge base article "How to provide valuable feedback to NVIDIA" as a guide to help you include information that will help us root cause the problem.

http://nvidia.custhelp.com/app/answers/detail/a_id/3141

7) Software/driver issues can sometimes be specific to a users system configuration. Please provide your system information so that we may attempt to match it as closely as possible.

CPU make and model:
Amount of system memory:
Motherboard make and model (if OEM system, please provide your PC make and model instead):
Motherboard BIOS version:
Monitor(s) make and model:
Sound card make and model:

8) If your system meets the driver requirements however the installation process fails or gives you an error message, please reinstall the driver with logging enabled so that we may investigate the cause for this issue. Instruction available from the URL below:

http://nvidia.custhelp.com/app/answers/detail/a_id/3171
And send any dump files from C:\Windows\LiveKernelReports\WATCHDOG to driverfeedback@nvidia.com
With a detailed spec and issues you are experiencing.