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Two-Display Adapters
If the host does not have an onboard graphics adapter, VMware recommends that you install an additional low-end display adapter to act as the primary display adapter. This is because the ESXi console display adapter is not available to Xorg. If the high-end NVIDIA card is set as the primary adapter, Xorg will not be able to use the GPU for rendering.
If you have two GPUs installed, the server BIOS might give you the option to select which GPU should be the Primary and which should be the Secondary. If this option is available, make sure the standard GPU is set as Primary and the high-end GPU is set as Secondary.
ESXi Special Access Command
If you only have a single GPU, there is a command that will enable said single GPU to be used with vSGA; however, VMware does not recommend that the single GPU be used regularly as the setting is not persistent
To configure an ESXi host with only a single GPU, first find the PCI ID of the graphics device by running the following command:
# lspci | grep -i display
You’ll see something similar to this:
000:128:00.0 Display controller: NVIDIA Corporation GT200b [GeForce GTX 275]
Then you must reset the ownership flags referencing the PCI ID above (in bold):
# vmkchdev -v 0:128:0:0
Important: This setting is not persistent, and must be re-run each time ESXi reboots
