Taichi x470 + 5800X - boots but no video
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=19479
Printed Date: 08 Aug 2025 at 7:03am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Taichi x470 + 5800X - boots but no video
Posted By: himerope
Subject: Taichi x470 + 5800X - boots but no video
Date Posted: 27 Aug 2021 at 6:47am
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Hi guys, I have a Taichi x470 motherboard, and I recently upgraded my CPU from a 2700X to a 5800X. I flashed the BIOS to 4.70 before I did it, and reset the CMOS. It boots no problem, and I can hear the Windows startup sounds and things, but there's no video signal, not even the BIOS boot screen. The monitor stays completely asleep. I tried downgrading to 4.60, and the same thing. I can swap in the 2700X and there's no problem, it boots perfectly with video. But if I put the 5800X in, while it will boot Windows, I can't get the video card to be recognized. Any ideas what the problem might be? I've reset CMOS multiple times, tried HDMI, different DisplayPort ports, different video cards. No luck. My video card is a 2070, but I also tried an older 980Ti card that I know works. I keep thinking it might be the CPU, but it seems so unlikely that it would boot Windows and be defective. |
Replies:
Posted By: Khun_Doug
Date Posted: 28 Aug 2021 at 2:59pm
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Hi Himerope, That reads to me as if the motherboard is not initializing the GPU. Probably some unexpected side effect of the CPU change. There are two things I would try. First, is it possible to temporarily move the GPU to the other PCI slot? That might be enough to get the motherboard to detect the GPU. That's clearly not a permanent fix, but it would give you more information. Second, using the CPU that works, I would go into BIOS and look for settings that can override the PCI slot settings. I had an EVGA motherboard that simply would not detect a PowerColor GPU about 20% of power-on. The system had no BIOS and no OS display. It would take a power-cycle to resolve the problem. I had to override the default in BIOS and force the slot to PCI3 to allow the GPU to be detected. I expect you might have something similar happening here. |
Posted By: Xaltar
Date Posted: 28 Aug 2021 at 3:48pm
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You can also try manually setting the PCIe gen to 3.0 for the slot you are using. Sometimes the "auto" setting can cause issues like this after a major hardware change. If it works you can try going back and setting it to auto again. ------------- 
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