The specs of my desktop are
HD 7970 GHz
32GB DDR3 1600MHz
Kingston HyperX 3K 240GB SSD
My laptop has
8GB DDR3 1600MHz
Adata SP600 64GB SSD
both have windows 8 fast boot disabled.
why does the desktop take around 30 seconds to boot after post while the laptop takes only about 9 seconds.
your desktop has a powerful graphics processor that is on its own card and has to be initialized and setup by the graphics driver, your laptop has a graphics processor that is built into your cpu. very fast to set up its electronics.
(this assumes, both systems are loading about the same software in startup, and other places)