According to a Valve Engineer, the Steam Machine specs outclass the most common PC configurations. The company relied on its own hardware surveys to choose the system’s components. Even as an entry-level option, Valve claims that 4K/60 fps performance is realistic, despite a memory-limited GPU.
But can’t run them at 8k with every option turned up to Ultra therefore the Steam Machine is garbage and the game engines are unoptimized and the developers are lazy. /s