Radeon RX7600 Mech 2x Classic OC wont show bios, post and early boot

[cgecastr157c02e1]

Hello just installed a Radeon RX7600 Mech 2x Classic OC on a ASUS TUF x670E motherboard with a AMD 7600 processor.
My monitor is pluged in via hdmi. I installed AMD Adrenalin 23.5.1
All the screens up to login are black. I can´t see the bios (unless i plug the monitor to the motherboard hdmi). The system works fine except for this problem.

 

[darkhawk]

what monitor?
How are you connecting it to the monitor? HDMI? DP? etc?

 

[cgecastr157c02e1]

@darkhawk
The monitor is an old LG monitor that works fine. I’m connecting via hdmi. OS is windows 11 (fully updated). I have reset the bios on the motherboard. updated the bios on the motherboard to 1618.
I have tried different hdmi cables and ports on the monitor but the problem remains.
The OSD of the screen confirms that there is signal 1080p @ 60Hz during the "no image, only black phases"
I had tried a couple of other graphics cards ( rx6500xt and rx6800xt both asus tuf) and none of them had this problem.

IMPORTANT:
If I perform a unclean shutdown (hold the power button until the machine shuts down) on the next boot it shows vídeo as if there was no problem, although sometimes the very first screen has a green tint.
The previous only works if the monitor is showing video

what monitor?
How are you connecting it to the monitor? HDMI? DP? etc?

 

[Alan J T]

See what happens if you disable the onboard IGPU in the BIOS it may be defaulting to it due to bios settings
Or make sure to set to PEG and Hybrid.

It may also be the Newer connections on the GPU I think it is all 2.1+ for all ports HDMI and Displayport with the new 7000 series GPU so you may have to try 2.1+ VGA Cables
And this may also be a compatibility problem with the monitor due to new Hardware. Are you able to test with a different monitor or a newish HDMI TV

 

[cgecastr157c02e1]

My motherboard is not msi, it is asus, but i have similar settings and yes, primary graphics card is PCIe and onboard is disabled. Unfortunatly i do not have a newer monitor or tv to test with, but hdmi should negotiate the fastest possible speed ie. be backwards compatible.
As I stated before the monitor OSD says there is a connection 1080p@60Hz, just no image until later in the boot process.
For me to access the bios I have to force shutdown the machine "after" there is video on screen and then reboot.

 

[Alan J T]

My motherboard is not msi, it is asus, but i have similar settings and yes, primary graphics card is PCIe and onboard is disabled. Unfortunatly i do not have a newer monitor or tv to test with, but hdmi should negotiate the fastest possible speed ie. be backwards compatible.
As I stated before the monitor OSD says there is a connection 1080p@60Hz, just no image until later in the boot process.
For me to access the bios I have to force shutdown the machine "after" there is video on screen and then reboot.

Ya that points to the monitor being a bit on the older size and not being able to switch on in time

What happens if you turn on the monitor first and then boot up the PC

Turning the monitor on and of again may also show the Bios screen if it is showing blank but getting signal

 

[darkhawk]

@darkhawk
The monitor is an old LG monitor that works fine. I’m connecting via hdmi. OS is windows 11 (fully updated). I have reset the bios on the motherboard. updated the bios on the motherboard to 1618.

Still doesn't answer the question.......We ask for specifics for a reason.

 

[Deleted member 980762]

I also had this problem after upgrading to a Gaming X RX 6650XT (with Gigabyte motherboard). Tried everything to get into the BIOS settings (windows recovery UEFI option, different monitors, etc.), but I could only get in after resetting the CMOS on the motherboard. But after I put my settings back, it happened again... everything else was running fine, except I couldn't get back into the BIOS.

What seems to have worked is something I found on another forum, which is to disable "Above 4G decoding" in the BIOS settings. I'm able to reboot and get into the BIOS fine every time now, which is a major relief. (It turns out I had re-enabled that setting after clearing my CMOS, which I guess is why it locked me out again)

My only concern with this fix, is how it might preclude me from using resizable bar (or what ever else Above 4G is used for), but I'll take it over having to return the card and go through that whole headache, because being unable to access my BIOS settings is not an option. The issue also prevented me from using the motherboard's boot selection menu.

Hope this helps anyone else who's got this problem, it was driving me demented for hours.

 

[Alan J T]

OK so Comon factor is cards are PCIE Type 4 X8


When In bios can you set PCIE Type from Auto to PCIE 4.0
if possible times it is not and set Lane config from Auto to 8x8

You will have these setting some where in your BIOS

 

[Deleted member 980762]

My motherboard is just old enough that it only supports up to PCI-E 3. I wonder if that has something to do with it.

 

[cgecastr157c02e1]

i have the board on a pcie 5 slot. I will try the pcie4 slot

My motherboard is just old enough that it only supports up to PCI-E 3. I wonder if that has something to do with it.

 

[cgecastr157c02e1]

Still doesn't answer the question.......We ask for specifics for a reason.

The monitor is a LG M227WD

 

[cgecastr157c02e1]

As recomended I tried to disable "Above 4G decoding", set the pcie lanes to 8x8 and pcie version to 4 and still the same. Also tried to set pcie version to 3 and didnt resolve the issue.
The only way to get into bios is to force shutdown after I have image on screen (user selection screen).
After I get into bios if i reboot I will be able to access bios again, but only the first reboot. After the driver loads (user selection screen) I can only acess after force shutdown.

 

[Deleted member 980762]

There could be some variations of this problem. For me, I was able to press the hotkey in time, and even got the "Entering setup..." message during POST, but instead of going into the settings it went straight to booting windows. Like it was just silently failing to enter setup. The only way I was able to get into the BIOS at all was using the clear CMOS jumper.

 

[darkhawk]

Looks like you're using a TV that has some 'built in monitor capabilities' according to what I can find.....
We've seen that in many cases, TV's just don't support things as well as a real monitor does.

Do you have any other monitors you could try with it?

 

[cgecastr157c02e1]

I will try to get another monitor, but i doubt that the monitor is the problem .
1st the monitor worked flawlessly with with the rx6500xt and rx6800xt.
2nd when I force the pc to shutdown I am able to enter the bios.
My guess would be some incompatibility with the rx7600 firmware and my motherboard or a AMD driver problem.
but for the sake of testing I will try to get a monitor.

 

[Alan J T]

My motherboard is just old enough that it only supports up to PCI-E 3. I wonder if that has something to do with it.

No not really should not matter as it is PCIE3 only, seems to be a problem sometimes when it has to decide what to run in whether PCIE5 or PCIE4 or PCIE3 it sometimes gets stuck

 

[Alan J T]

Have you tried swapping VGA in ports seems you have two HDMI and a Displyporrt can you try them with the correct rates HDMI- 2.0 or better HDMI- 2.1 prefered or DisplayPort 1.4a or better

And you are using a Monitor that is almost 15 years old so do expect problems with newer hardware.
I still think you need to get the newer VGA cables as backward compatible is not from the source a 2.0 port from gpu may not work correctly with a 1.4 cable backwards compatible not work that way

But more like HDMI 2.1 GPU OUT to HDMI 2.1 cable to an HDMI 1.2 monitor will work but not the other way around
For a HDMI 2.1 GPU Out to a HDMI 1.4 Cable to HDMI 1.2 Monitor may not work correctly

 

[cgecastr157c02e1]

Ok, I stand corrected.
I tried connecting to my living room TV and I am able to enter the bios without force quiting the PC, but the "hit del screen" only shows very briefly. But still it shows everything, shows all post screens.
But I still think this is not normal behaviour even if the monitor is very old.
The ASUS TUF Gaming Radeon™ RX 6500 XT OC edition 4GB GDDR6 that I had before with the same monitor and is also a HDMI 2.1 card with the same cables did not have this problem. Also the TUF GAMING Radeon™ RX 6800 XT OC Edition did not have this problem and it is also hdmi2.1.
What is "unexplainable" is why if I force shutdown (pressing and holding the power buton)the machine then it shows the "hit del screen" (with a green tint) but then enter the bios with normal colors, and also that when the AMD drivers load everything works fine.
Something is implemented wrong on the card (as proved by the Asus cards working) but I don't expect it to get fixed. I'll have to wait until I get a new monitor

 

[cgecastr157c02e1]

I still think you need to get the newer VGA cables as backward compatible is not from the source a 2.0 port from gpu may not work correctly with a 1.4 cable backwards compatible not work that way

I'm not using VGA, i'm using HDMI and the card (RX 7600) does not have vga out, only HDMI and Displayport. Also the cables should work fine even with a Standard hdmi cable as the bandwith for a standard cable is 5 Gbit/s and 1080p60Hz only uses 3.96Gbit/s but I am using High speed cables wich are fully compatible with 1080p60hz. There is nothing on the cable telling the graphics card or monitor that it is a newer or older cable, when the card and the monitor handshake they shoud set the propper mode, but the card is lacking some feature (because MSI deemed it to old) so the handshake is not compleatly sucessfull, I assume it has something to do with color (bit depth, color space or color format.
Funny is that when the driver loads it is able to make the correct display.
As I said previously the monitor works fine once windows 11 is loaded (the capture is from windows screen properties. (the labels are in Portuguese))