How to set primary GPU on X399M Taichi
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=41896
Printed Date: 21 Jul 2025 at 9:00pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: How to set primary GPU on X399M Taichi
Posted By: Libadoxon
Subject: How to set primary GPU on X399M Taichi
Date 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? |
Replies:
Posted By: SerchTech
Date 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 |