The bright pixel was a hardware defect. The LCD was replaced.Uninstalling nvidia's drivers and installing the graphics drivers provided by Dell solved the irregular CPU usage and the freezes.The electrical noise/sound still occurs. This issue was not resolved.
G15 5510 is truly a great and powerful laptop. Unfortunately I have ran in the following problems within the first 3 months. FreezingRegularly and at random intervals the display is freezing as in, it stops to a frame which gets stuck forever. I can't move the mouse or use the keyboard, but I can still hear the audio. The only solution is to shut down the computer via the physical power button. CPU The process "System" uses 8~11% of the CPU constantly which might explain the freezing. After following the steps in the first answer from this post: [URL] I traced the culprits which are ntoskrnl.exe, nvlddmkm.sys and dxgkrnl.sys. I am not sure what is the problem though. Here are some screenshots: [IMAGE] [IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE] Mouse Noise When I move the mouse I hear an electric noise from within the laptop. I'm confident that the sound does not come from the speakers. It is a high pitched electric sound which is very distracting. After some fidgeting I realized that the volume of this sound is proportional to the polling rate of the mouse. So, the sound is weak when the polling rate is set to 100 and it gets loud when the polling rate is set to 1000. I have read Dell's article regarding that matter and I am not convinced that "The noise is normal and within the acoustic specifications of the computer.". When I use the same mouse with my other Dell laptop I do not hear any sound when moving the cursor. Furthermore, the recommended solution does not work and even if I disable C states in BIOS I can still hear that sound.   Bright Subpixel Unfortunately I have also discovered that the screen has one bright (red) subpixel which can be seen clearly when the background color is black.I welcome any suggestion/solution regarding these problems. Also I'd like to know if the basic warranty covers these issues, including the stuck subpixel.  
G15 5510 Display Freezing + Bright Subpixel + Irregular CPU Usage + Mouse Noise