1 Copper

RE: Dell XPS 9550 POST UEFI/BIOS Speed

Unfortunately this is not Dell's fault. I posted a question on and got the answer. It is a DDR4 Problem not DDR3

MosGuy said:
The XPS 13 and Macbook Pro 15 both have DDR3 memory. The XPS 15 uses DDR4 which performs memory training as the bios initializes. It will always have slightly longer boot times vs DDR3.
My additional research: According to Anandtech "The downside to the user is that the number of modules in the system effects the boot time of the device. A fully laden quad-channel Haswell-E system adds another 5-8 seconds to perform this procedure, and it is something that cannot be circumvented through a different routine without disregarding part of the specifications."