The primary benefit of the 64-bit executable is stability. 32-bit applications are architecturally limited in how much system memory they can address. In Borderlands 2 , this was a notorious bottleneck for players using the Ultra HD Texture Pack
You cannot run the 4K texture pack on the 32-bit client. Attempting to do so results in immediate crashes. The client is mandatory for the 4K textures. It allows the game to stream textures that are four times the resolution of the originals, making the cell-shaded art style pop on 1440p and 4K monitors. borderlands 2 64 bit