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I have a CPU Intel 10400. It has integrated graphics.

I've been using that iGPU for years, with two monitors plugged into motherboard (using HDMI-HDMI and VGA-HDMI cables) until I recently bought RX 570 Sapphire Nitro+ 8gb.

It turned out that no matter in which ports of the GPU I plug my three monitors, only two would work at the same time. So I decided to plug two monitors into the GPU (using DP cables) and one monitor into motherboard (tried HDMI and VGA cables).

It didn't work - at first. Then I went to BIOS, kept the PEG option there, but turned on the multi-display option. Once that was done, the third monitor started to work, with only drawback of blinking into blackness once a minute or so.

To fix that I decided to try to change PEG to IGD in BIOS. My understanding was that it would use iGPU during the boot process. However after the change I can't see my BIOS - all monitors are black until the OS boots.

I tried to take out the motherboard's (MSI B460M-A PRO) battery and putting it back 15 minutes later, however it didn't help - I still can't see BIOS.

I'm at my wits' end. Now I wouldn't even be able to reinstall my OS, because I can't change the boot order in BIOS, because I can't see BIOS.

EDIT:

After I took out and put back the motherboard's battery, I also tried to take out the GPU. The BIOS can't be seen, but two monitors plugged into motherboard work as normal.

If GPU is plugged in, the BIOS can't be seen, and only monitors plugged into the GPU work, those plugged into the motherboard don't work.

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  • Have you tried removing the RX 570?
    – Mokubai ♦
    Commented Jun 27 at 19:00
  • @Mokubai Please see edit
    – parsecer
    Commented Jun 27 at 19:02
  • This item on reddit seems to say that you might be able to use 2xHDMI + 1xDP, in case that's a combination you didn't try.
    – Andrew Morton
    Commented 2 days ago
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    Have you pressed the key to go into the BIOS even though you can't see the initial screen? It's possible it's set to fast boot so you don't get to see it. Referring to the manual, page 17 states how the BIOS should be reset, and page 19 implies that there can be a problem using an older graphics card. The latter led me to rx570 gop issue - do you know if your RX570 has had its VBIOS updated?
    – Andrew Morton
    Commented 2 days ago

1 Answer 1

Reset to default
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Couple things:

  1. Try using these procedures from your manual to clear the CMOS (just removing the battery would not clear CMOS on a modern MB) CMOS RESET MSI

  2. Try using a raw VGA cable and monitor (not a digital monitor). I've seen it before where the digital graphics won't load fast enough with certain MB settings. IGD means INTEGRATED ONLY - so only the connections that do directly into the MB are going to work. This VGA connection (don't use the HDMI): VGA

Lastly to address your monitor concern. You may be running into a HDMI/DP signal typing issue. What I would try is plugging in 2 monitors with the HDMI cable, and the third using the DVI cable. Get a DVI to HDMI converter, DVI usually converts well from HDMI.

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  • Do you happen to know that 2xHDMI + DVI can work? The thread I linked to in an earlier comment seems to say that combination is almost guaranteed to fail.
    – Andrew Morton
    Commented yesterday

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