"When a game is running, the CPU needs access to a graphic card’s memory, and by default it can only access 256MB at a time. However, resizable BAR removes the size limitation so the CPU has access to all of a GPU’s memory, theoretically allowing for improved performance. This adjustment lets the CPU request much larger chunks of data from the GPU, which can improve performance in games that can benefit from this change."
"When a game is running, the CPU needs access to a graphic card’s memory, and by default it can only access 256MB at a time. However, resizable BAR removes the size limitation so the CPU has access to all of a GPU’s memory, theoretically allowing for improved performance. This adjustment lets the CPU request much larger chunks of data from the GPU, which can improve performance in games that can benefit from this change."