Resizable BAR (Base Address Register) (or ReBAR for short) is a modern PCI Express feature that lets your CPU access the full video memory (VRAM) of your GPU directly, removing the old 256 MB limitation and potentially reducing bottlenecks in data transfer between the CPU and GPU in games. When supported by your hardware (CPU, motherboard, and GPU) and properly enabled, ReBAR can improve performance in certain titles, making gameplay feel more responsive and consistent. Each of the three major GPU vendors supports this feature, but the implementations differ. AMD introduced it first as Smart Access Memory (SAM) with their […]
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