Im having exact same problem with my 4days old G3-3579
Did Dell provide you solution on this?
Thanks for posting, apologies that your system is not performing as expected.
Do you experience this same situation under normal circumstances? Like when looking up information on the internet? How about when using productivity software? Email? If not, then the system is likely performing as designed.
What system BIOS are you running? Make sure you have 1.8.1 installed. Also, what Operating system are you using?