No superhero effort is required from your PC to experience the newest from Marvel's Dream Team. A perfectly reasonable and pedestrian performance will do just fine.
Ahead of this weekend's Marvel's Avengers beta, Square Enix has released the PC specs to run the game at both minimum and recommended settings. Neither is too tasking, but your hard drive might feel as though someone took the Hammer of Thor to it. (Although, to be fair, even those requirements aren't particularly noteworthy by modern standards.)
Here's what's needed to run Marvel's Avengers at the lowest settings: