The game has become notorious for crashing every 15 minutes, chugging whenever NPCs are in sight, and characters getting stuck in the environment. There have been a couple of patches released so far, but they don't seem to do anything. It gets better, though. Quite a few of these glitches existed in Fallout 3 too, and on top of that, they had been fixed. The most notable and crippling one is the NPC framerate problem. Whenever NPCs with facial expressions such as ghouls and humans are on screen, the framerate drops significantly. This is because the game relies on the CPU to render their facial expressions. This was a problem in Fallout 3 as well, and an unofficial fix exists that allows the players' GPUs to render the facial expressions instead. The fix was a simple DLL that Obsidian probably could have just included with the game.

No, it isn't. The GPU is used to render the whole game, you shouldn't really rely on information from encyclopediadramatica, it's not a reliable website.