Selected between GPU to boot or boot without using gpu

[ducnghich]

I want to use my gt 730 for unraid. This will allow VM passthrough to be easier. gt730 is x1 slot so no matter what I do the OS still picking my high performance x16 slot card

[JonathanM]

This is controlled by the motherboard. Some boards have the option to change the primary card, some don't.

[ducnghich]

yes but can the os disable the use of gpu?

[UNOPARATOR]

If you want a specific GPU not to be used by unRAID OS itself so that you could passthrough it to a VM, you would need to go to MAIN tab and lick on your Flash drive:

From there you would need to change Syslinux Configuration:

The red box is used for a completely headless unRAID, so you might omit that.

The values in the yellow box can be gathered from TOOLS --> System Devices menu:

You might need to fiddle with SETTINGS --> VM Manager (in Advanced mode) --> PCIe ACS override: for a working IOMMU Group configuration.

Note: I have a single GPU in my system, I'm running unRAID as headless and I'm reserving that GPU to be used in a VM.

 

But as @jonathanm mentioned, if you would like to use a dedicated GPU just for unRAID, you must set it up as your primary GPU from your motherboard's BIOS (if that option is there).

 

P.S: There might other workarounds, but this is all I can provide.

Edited December 20, 2020 by UNOPARATOR