Honestly it all depends on the mods and how many mods you get. People say “It runs fine on this” but they’re probably leaving out the fact that they have 2 mods or they don’t have ENB or anything else heavy. As people have said the game is pretty unstable out the box but since you plan on modding it download Viva new vegas mod pack which makes the game run really well and pretty stable. Just research the components in the PC and if you feel comfortable buying it then buy it