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5900x wont show bios screen

pzr vr6

pzr vr6

pzr vr6

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Joined
5 Jan 2010
Posts
890
I have an msi x570 tomahawk mobo and was using a 3600x cpu to get it all running. The 5900x arrived today and i fitted it.

I get a black screen with no post or bios onscreen, it will boot to windows after 3 attempts but i cant get into the bios at all it just stays black screen

Iv tried updsting the bios and resetting it, also renewed the 6800xt drivers too, no joy. Any ideas whats goin on?
 
unknown then
i find on my monitor, i have to connect using hdmi for bios to show, using displayport it cannot show due to some limitation or other
if you've used hdmi, then clearly this isn't the issue

how did you update the bios when you couldn't get into it?
bios flashback?
 
This is a long shot but I wonder if it could be that the monitor is set to a resolution that the bios cannot be displayed at?

I have in the past read that changing the monitor resolution to a more standard 1080p and making sure hdr mode is off etc may allow the bios to show up.
 
Do you have nvidia GPU ?

can’t find my other post (sorry on my phone) where I linked to the display port upgrade on nvidia GPUs. This fixed the issue for me.
 
kidloco said:
Do you have nvidia GPU ?

can’t find my other post (sorry on my phone) where I linked to the display port upgrade on nvidia GPUs. This fixed the issue for me.
Click to expand...

I was just about to link your helpful post for those drivers but then realised the OP has a 6800XT.
 
I have an LG monitor and have exactly the same issue. I never got to the bottom of what caused it. Fortunately I have a dual monitor setup and it works on the other monitor. The other monitor is 1080p, so perhaps the theory about the resolution being set too high on the monitor is correct.
I've had the issue on a 5700xt and now a 3080.
 
In another forum, someone mentioned the adaptive sync option needs to be turned off. It did not work for me unfortunately.
 
I had this issue myself on my lg - I could connect with dvi, but I found if I changed the display port 1.4 from enabled to disabled I could get into the bios on display port, unsure if it works on hdmi as I didnt try that cable
 
I have this problem when having done a bios reset, the problem is you have to enable launch csm to enable in bios, to do this I have to connect the monitor by dvi/hdmi. My monitor does not have dvi so used my old monitor to just be able to get in to bios to enable csm. Have you got dvi connection or a second monitor to hook up to do it. That was my problem anyway :)
 
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