A:Answernot sure about the exact temperature. But definitely stays pretty cool and even when fans come on the noise is minimal. This PC definitely stays a lot cooler than the HP Spectre.
A:AnswerYou can swap out the out of the box sata ssd with an nvme. There's a guy on reddit who's done it with success.
https://www.google.com/search?biw=360&bih=289&ei=wxe0WcbQAaGPjwS-yo7IAg&q=Swap+Nvme+with+sata+ssd+for+Samsung+Notebook+9+Pro+NP940X5M-X01US&oq=Swap+Nvme+with+sata+ssd+for+Samsung+Notebook+9+Pro+NP940X5M-X01US&gs_l=mobile-gws-serp.12...12613.25715.0.27370.20.19.0.0.0.0.364.4361.0j3j12j3.18.0....0...1.1j4.64.mobile-gws-serp..8.7.1688...30i10k1.4KI6DvBDp48#scso=uid_WbQX3wAOnHYKg-6Bowsdbw_2:667&xxri=2