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NVIDIA SLI 不工作

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NVIDIA SLI 不工作

几天前我安装了全新的 Ubuntu 20.04。

我已经安装了 NVIDIA 驱动程序，一切运行良好。 NVIDIA 驱动程序

现在我想设置 SLI。所以我插入了第二个 GPU 和 SLI 桥：

我的显卡

为了启用 SLI，我运行了以下命令

sudo nvidia-xconfig --sli=on

现在的输出cat /etc/X11/xorg.conf是：

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 440.64

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 440.64

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "BenQ EX3501R"
    HorizSync       28.0 - 155.0
    VertRefresh     48.0 - 100.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 970"
EndSection

Section "Screen"

# Removed Option "SLI" "on"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-1"
    Option         "metamodes" "3440x1440_100 +0+0"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    Option         "SLI" "AFR"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

两种 GPU 均能被 NVIDIA X 服务器设置识别

设置

但即使重启后，SLI 似乎也没有启用。当我执行 GPU 密集型任务时，GPU UtilizationGPU 0 的比率会增加，但 GPU 1 的比率保持在 0%。

GPU 0

GPU 0

GPU 1

GPU 1

这是我的系统信息

系统信息

SLI 桥

滑桥

答案1

尝试

sudo nvidia-xconfig -sli = on -multigpu = on

或者

sudo nvidia-xconfig -sli = auto -multigpu = auto

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