TLDR
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Linux-only guide to flash RTX 3080 VBIOS via nvflash to enable Resizable BAR (8 GB BAR1), no Windows or GUI required.
Key Takeaways
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ASUS ships VBIOS updates as Windows .exe installers; 7zip extracts the ROM, then nvflash 5.867 on Linux flashes it directly.
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Linux nvflash does not support
--force-subsystem-id or --force-board-id; correct invocation is just nvflash -i 1 <rom_file> with no force flags.
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nvflash reads confirmation prompts from
/dev/console, not stdin, so yes | nvflash silently fails; expect with a pseudo-TTY is required.
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ROM selection must use subsystem ID (1043:87B0), power target (340 W), and boost clock (1785 MHz), not AS-number or version suffix order.
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Services with
Restart=always (nvidia-persistenced, gpu-watchdog) must be masked or pkill -9‘d before unloading NVIDIA kernel modules.
Hacker News Comment Review
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