The evolution of ReBAR on GeForce GTX 16 and RTX 20 through UEFI modification brings new capabilities to users.
AMD popularized the idea of enabling a PCIe feature called ReBAR (ResizableBAR) on consumer graphics cards through the introduction of Smart Access Memory technology. NVIDIA was quick to adapt its graphics cards to support this technology (offering a patch for the GeForce RTX 30 series cards), and motherboard manufacturers followed suit by enabling this feature on more motherboards. A tool called ReBarUEFI can patch the UEFI firmware and enable support for this feature on an even wider range of motherboards. However, there is still the issue of enabling ReBAR on older graphics cards.
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Modders have now proposed a new solution for the Turing-based GeForce GTX 16 and RTX 20 cards. The proposed solution does not work with the “Pascal”-based GeForce GTX 10 cards, however. Those who still use them are in luck, as the new solution seems quite simple and easy to use.
By enabling ReBAR, the graphics card negotiates the size of the BAR (Base Address Register) with the motherboard. This tool can be enabled automatically or manually confirmed. However, it should be noted that this mod involves patching the UEFI firmware on the motherboard, so make sure you are aware of the risks involved.
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Additionally, check reviews that compare graphics cards with ReBAR enabled and disabled to see if it's worth it. NVIDIA is not expected to provide a solution to enable ReBAR on GTX 10/16/RTX 20 cards, so this may be the only solution available. All modern graphics cards come with ReBAR enabled, and some cards still require ReBAR platform support (like Intel ARC).
Information source: videocardz.com
