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PC Building

SirMetro
Adept I

Onboard GPU will not let RX 6700 XT run

Recently purchased a ROG Strix B650E-F Gaming WIFI with a Ryzen 9 CPU

I have an AMD Radeon RX 6700XT video card installed in the PCI slot

Intent is simple, replace my aging AMD 8 core with a nice 12 core system while reusing my RX6700XT video card. When I work from home, the graphics is very sluggish with basic video. The RX6700XT made my life easier so I could focus on my work and not wait on the refresh when I panned around a large PDF file.

Problem I have is that the onboard AMD Radeon Graphics Card will not allow the AMD RX6700XT card take over

As such, it will also NOT allow the Adrenalin software to run.

When I go into the BIOS and turn off the on-board GPU, the system will not boot up

I have to unplug and pull the battery for a few minutes to reset the system before I can get back in.

Any help or direction would be appreciated, and I would be very grateful for anyone's guidance.

Am almost to the point of just reassembling my old system and forgetting about it all.

If it matters, I have an LG widescreen (34") and memory is maxed out and this is a clean new MS 11 and a samsung 1 T hard drive

14 Replies
ThreeDee
Paragon

make sure you are plugging your monitor into your video card and not the motherboard 

make sure your video card is seated properly

make sure you are running separate power cables from your power supply to each power input on your video card

 


ThreeDee PC specs

At the moment, the monitor is plugged into BOTH the onboard GPU and the Video Card

The monitor allows me to switch between cables for data input

Power to the GPU card isn't a problem

Computer "see's" the Video card, but the onboard GPU will not let the video card take over

And I have "disabled" as well as "uninstalled" the onboard GPU via Windows 11, but after a reboot, windows reinstalls it.

I did disable the onboard GPU in the bios, but I must be missing something because the video card doesn't step in and the system refuses to boot up

Have been wrestling with this for nearly a month now, it's frustrating and it shouldn't be this difficult.

Your issue is your plugging  into both gpu's at the same  time you cant do that or else it will deactivate the PCI GPU , Just only plug into the installed GPU and your good to go .

I agree.  Only plug the monitor into the RX 6700 XT video card.  Use a new DP cable too, as opposed to an HDMI cable.  It could be that your current monitor cable to the video card is defective.

I would also recommend clearing the BIOS by pulling the battery for a few minutes (with power cable removed from the PSU), but do that after looking for a BIOS update and flashing the BIOS to the latest version if it's not already installed.  Do that while using your working integrated graphics with the monitor cable only plugged into the motherboard video output.


As Albert Einstein said, "I could have done so much more with a Big Al's Computer!".
0 Likes
SirMetro
Adept I

ok, this is my system setup

Motherboard - ROG Strix B650E-F Gaming Wifi

CPU - AMD Ryzen 9 7900X with Radeon Graphics

12 Core, 24 Thread Processor, 5.6 GHz Max Boost, 4.7 GHz Base

Memory -  G.Skill Flare X5 DDR5-6000 - 128 GB

The above items are working perfectly together

The Problem child is my PCI based GPU which happens to be a

PowerColor Radeon RX 6700 XT Red Devil

for reasons I do not understand, the CPU based GPU will not allow the PCI GPU to take over or function

I followed the instructions provided by someone else regarding the BIOS, but the system would not boot up at all.

I really need this other card to function because when I log into the office, the onscreen graphics lag badly and the PCI board made that problem go away.

Any guidance would be appreciated.

For what it's worth, the computer sees BOTH the CPU and the PCI, but will not allow the PCI to take over 

radguy88
Adept II

I don't see it mentioned above, so I don't want to assume, but make sure that you update your BIOS to the latest version. I suggest resetting the BIOS as well. By default the board should support video output from your dedicated GPU (as long as your monitor is plugged into the GPU) by default.

jaandoh
Challenger

I was always under the understanding, that you should point to the graphics you DON'T want as the default, and then the system would try the other slot first... 

So if I want to boot to the igp, I point to the vga card in the vga slot... 

And if I want to boot to the vga card in the vga slot, I point to the igp slot... 

 

A kind of reverse psychology?... 

Off course, I don't know if that's still valid since so much has changed recently... 

 

XVIIII
Adept I

I've been having this exact same issue for months now. Same mobo, same GPU.

It sometimes (very rarely) used to work, but most of the time at boot it just gets stuck with the white LED glowing if my screen is plugged into the GPU.

I've sent the GPU back to the shop I bought it from hoping they'd find an issue, but they tested it extensively and it was fine. So now I'm left with either the mobo or the PSU being the issue. I was quite opposed to sending those back for obvious reasons, but at this point I might have no choice.

Anyone have any ideas on what to do next? 

I considered opening a new thread for this, but since our cases are so similar I figured I'd try it here first. 

BigAl01
Volunteer Moderator

I think this is a BIOS problem with the motherboard.  I would only plug the monitor cable into the PCIe video card and in the BIOS I would disable the integrated graphics.  Also make sure your PCIe slot is set to PCIe 4; if it is already, you might try PCIe 3.  


As Albert Einstein said, "I could have done so much more with a Big Al's Computer!".

I've already tried those settings too, I'm afraid. Thanks for the suggestion though.

 

I'm also discussing this on reddit and found someone else there with the same problem.

We happen to have the exact same GPU down to the brand and model, but slightly different motherboards, though they're both B650.

They even had the same way of making it (sometimes) work: repeatedly rebooting in frustration until it posts for unknown reasons, though even this has stopped working for me. 

 

Link here

johnnyenglish
Big Boss

A bad cable will give you the white led if you don't turn your monitor first before starting the computer. Try it.

Set GPU affinity in Windows for troubleshooting and/or disable iGPU if you dont need it.


Example:


johnnyenglish_0-1719478549144.png

 

The Englishman

I've replaced both the GPU power cables and the video output cables, both with no luck.

I did notice that my PC wouldn't boot at all when my screen is off, so I actually set my main screen up to never turn off and instead go into sleep mode when the off button is pressed. This also didn't change much for the GPU unfortunately.

I don't think I can change the preference in windows since it doesn't see the GPU at all if I boot using the on-board GPU, which is the only way I can reliably boot. I did change the preference in the BIOS, again without effect, but I don't think I can disable anything there. I've tried disabling the on-board GPU in windows when the other one did work, but it was usually gone again at the next boot. 

To be clear, you are using the cable connected from board to monitor or else it doesn't boot, right?

 

If so, you should be troubleshooting the card for malfuction first, so cable needs to go to the card and nothing else.
Try to re-seat the card, if there are no LED indicators on card itself(it means no power), inspect for damage, use another PCIe slot, if it has dual BIOS try the other or even put it another system from a friend. Be sure to have a decent&recommended PSU to go along.

You can disable the iGPU inside BIOS, there should be a search function, use it.

Example from a ASROCK

johnnyenglish_0-1719487301409.png

 




The Englishman
eebiii
Forerunner

it’s most likely a MB issue. I wouldn’t fight it anymore. Replace the MB. IMO