As No Mans Sky is generated procedurally, it relies heavily on computer hardware to quickly create the game experience for the player. The sort of PC required to meet recommended NM:Sky specs while still achieving a reliable frame per second at 1080p would be an i7-980 2.8GHz processor or possibly an AMD FX-8120. The more powerful the processor the smoother the experience with this type of spontaneously generated game. RAM will likely play a significant part and at least 8GB RAM will be needed for No Mans Sky when you are swooping down across the landscape of a planet that is being built in front of your very eyes. Finally an Nvidia GTX 480 is the minimum graphics hardware or an AMD HD 6970, but I suggest looking for more powerful. Perhaps a R9 285 or GTX 960.
No Man's Sky is a procedurally generated science fiction game. Featuring planetary exploration, deep oceans, space-based battles, and potential predators on the various procedurally-generated worlds. Each world has its own ecosystem with potentially unforgiving conditions, such as desert worlds with large carnivorous worms.