Please give me more information about the voltage issue. The graphics driver does not change BIOS settings.
Do you have the latest BIOS version M3800-A10? Additionally let me know if you installed the latest chipset driver provided with Dell support page and the latest Intel® and Nvidia* graphics drivers.
If yes, please download and run Intel® System Support Utility and send me the results.
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I was checking this thread and I would like to know if there is any update regarding the information requested previously.
I look forward to hearing from you.
Please download the latest video drivers for your graphics controller and let me know your findings.