So I happen to have a AMD mashine with one dedicated GPU PCIE slot and multiple normal pci x8 and pci x1 slots and I plan on using this mashine for unraid and GPU passtrough but as you need 2 GPU's my question is:

 

will it work if i use a cheapo GPU with one of those mining riser that convert PCI x1 to PCIE x16 just for unraid so I can passtrough my 1060 on the dedicated port?

My only GPU was running in PCIe x2 which provide by chipset. Mining raiser usually no problem. ( Cable as short as possible and use low power GPU )

For passthrough , this is another topic.

1 hour ago, DaHunni said:

as you need 2 GPU's

 

Actually, you don't. You can run unRAID headless and passthrough the only GPU, but having a secondary card is certainly useful for troubleshooting.

 

You can get PCIe x1 graphics cards. Zotac do a GT 710 card with a x1 interface that's available new. On ebay you can often get older x1 Matrox graphics cards that were pulled from servers.

 

You can use an adapter, such as this. It takes a low profile card and adapts it to fit in a standard height slot.

 

You don't give any information about your motherboard but on my Asus Prime X470 Pro I have an inexpensive Radeon HD 5450 card plugged into the bottom PCIe slot. It's physically a x16 slot but electrically has only four lanes wired to the X470 chip and as I'm using the x1 slots with which it shares bandwidth the card is actually connected to two PCIe 2.0 lanes.