Dell XPS 15 get too hot !

Hi,

I just receive my XPS 15 9570, it's the 16Gb 4k panel version and I have some troubles with temperatures.

I really think my dell Xps get too hot, I just open it, make the installation and install chrome. And now i'm just surfing on chrome but my xps go up to 70 C°, I think it's unacceptable for just web browsing, and also the fans are loud just when i'm on chrome. I can't believe what this will be when i'll do some big things with this computer.

On idle i'm also at 50 C° and I don't think this too is normal, can someone help me to get better temps and have a silent computer on idle ?

Thanks