How to set primary GPU on X399M Taichi

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   I have a system with two AMD GPUs, one in PCIe 1 and the other in PCIe 3. The GPU I want to use is in PCIe 3 but the one from PCIe 1 gets used instead. How do I change the PCIe slot that gets used for the boot?

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Libadoxon Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 06 Jun 2024 Status: Offline Points: 20	Post Options Post Reply Quote Libadoxon Report Post Thanks(0) Quote Reply Topic: How to set primary GPU on X399M Taichi Posted: 06 Jun 2024 at 4:18am
	I have a system with two AMD GPUs, one in PCIe 1 and the other in PCIe 3. The GPU I want to use is in PCIe 3 but the one from PCIe 1 gets used instead. How do I change the PCIe slot that gets used for the boot?

SerchTech Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 16 Oct 2022 Location: Spain Status: Offline Points: 1365	Post Options Post Reply Quote SerchTech Report Post Thanks(0) Quote Reply Posted: 10 Jun 2024 at 4:16am
	It's been a while since I used Multi-GPU on my X399 Taichi (non-M) but I remember that it could not be configured on BIOS, nor on Windows, I read some comments saying that it is possible on Linux but I'd never try it. By connecting the PCIe 3 GPU to the monitor, you may be able to get Windows to recognize it as primary, but you'll not see the POST screen (ASRock Logo) nor will you be able to access BIOS. In other words, there's no way to set the GPU PCIe 3 as primary during boot ... but perhaps ASRock support knows how to do it or if it's possible, try contacting them Good luck
	X399 Taichi (4.03) Threadripper 2950X DDR4 2 x HX432C16FB3K2/32