Graphics Cards

[Madsen03]

Hi all, this is a bit of a mind**bleep** for me at this point so please bear with me, I want to try to go through as much of the troubleshooting I've done as possible to avoid wasting anyone's time.

I was using an FX4300, Asrock 760gm-hdv, 8gb ddr3, rx480 8gb (SKU 21260-00) setup but decided to upgrade and picked up:
- Intel i5 10400f
- Gigabyte H410m S2H (later replaced by an ASUS Prime H410M-E; I'll get to that)
- G.skill aegis 2x8gb ddr4 @3000mhz

I slapped my old parts into another pc with a 560ti and installed the new ones with my rx480.
Attempting to boot the new setup with the RX480 gave me no display signal - at that point I tried to slot in an old HD 4550 into the new build and everything worked flawlessly. I then try to boot new build with the 560ti - everything works fine again. So it's not the hdmi cable, it's not the pcie slot on the new mobo.

Worried that my 480 is dead, I plug it into the old setup with the fx4300 and... it works fine. The PSUs are 500 and 600w for the old and new setups respectively and both have run the 480 no questions asked, so neither of them are dead or insufficient. Have tried all possible configurations of the RAM as well, no change, and the RAM does work when I boot with other cards.

I tried updating the bios for the new motherboard to the new version - no dice. Same with fiddling with bios settings - CSM on or off, above 4g encoding, just about every setting that makes any mention of UEFI or Legacy I try either way, etc. - once again, no luck. No signal when I use the RX480 with the new build, but it works fine with both the 560TI and the 4550.

To be clear, the 480s fan does spin up with the new build (and yes lol I'm plugging in the 6pin), I just get no display with it specifically. I booted with the 4550 and used DDU to clear previous drivers, I've reset the CMOS twice now, still no display from the 480 and only the 480 in the new setup. Will also mention that I'm almost certain the system is booting, to Windows, as I've found that in the first couple of seconds when I boot the system with the RX480 I only need to press the power button once to shut it down (as per the BIOS setting), but when I let it go for a minute (ie, when I give it enough time to get to Windows) I need to hold down the power button.

At this stage I return the Gigabyte motherboard and grab an ASUS one - exact same situation. No signal from the 480, works completely fine with the other 2 cards.

What's the chances that my 480 just doesn't play well with the BIOS' on these new motherboards? I'm seriously confounded, as searching up the SKU of the card gave me the knowledge that it's a UEFI card, but it works just fine on the AM3+ socket motherboard, but not on the LGA1200 ones.

I'm approaching wit's end here and am contemplating just shelving the RX 480 and trying to sell it while the GPU situation is as crazy as it is and using the 10400f system with a 560 Ti (ugh...).

Would really really appreciate any advice.
Cheers

[goodplay]

Did you use DDU to make sure previous NV/AMD drivers/software is fully uninstalled.

Is monitor connected to the RX480, motherboard bios set to use dedicated graphics card before you install driver software.

Is C drive configured to GPT(uefi) or MBR(legacy bios).

[Madsen03]

- Did you use DDU to make sure previous NV/AMD drivers/software is fully uninstalled

Yep, multiple times. Did a sweep on AMD drivers first, and then did one for Intel/Nvidia ones as well just in case.

- Is monitor connected to the RX480, motherboard bios set to use dedicated graphics card before you install driver software.

Yes, it is connected to the 480. The CPU has no iGPU so the BIOS defaults to using PCIe graphics already (though for whatever it's worth I've also tried manually setting it to make sure).

- Is C drive configured to GPT(uefi) or MBR(legacy bios).

I'm unsure, but can't imagine it matters, as the issue persists even when attempting to boot with no storage connected.

[elstaci]

Since you installed the RX480 on two different computer with the same exact problem does indicate a defective RX480.

You can always take it to a computer shop and have them test the GPU card for you but that depends if you want to spend any money on that card or not.

When you have the RX480 installed, even though you have no video output, does the computer still indicates that it is booting into Windows?

You can check this by looking at your computer case HDD/SSD LED Light. If it is blinking or solid while the computer is on indicates that it is booting up into Windows.

Try connecting your RX480 to a HD TV if possible and see if you get video output or try a different Video output on the GPU Card. Could be a defective GPU Port.

[Madsen03]

Since you installed the RX480 on two different computer with the same exact problem does indicate a defective RX480.

Apologies if I've misspoken somewhere - the problem does not persist on the other computer. The RX480 works perfectly on the other PC (and had done so for multiple years).

When you have the RX480 installed, even though you have no video output, does the computer still indicates that it is booting into Windows?

Yes; in the absence of indication LEDs, I realized that it does in fact boot to Windows based off of the power button's behavior (which is to say, if I press it a couple of seconds after booting the system, it shuts down with one press; whereas if I boot the system on, and let it go for a bit, I have to hold the power button down for a while to shut down, indicating that it's getting to Windows).

Try connecting your RX480 to a HD TV if possible and see if you get video output or try a different Video output on the GPU Card. Could be a defective GPU Port.

I have tried connecting it to a TV with the same issue; and I'll note additionally that the HDMI port works as it's the same one I used to confirm (on the other system) that the RX480 still works (with the same HDMI cable and monitor that I'm using when it doesn't provide a signal).

The GPU has 4 ports (1x HDMI, 3x DisplayPort) but I unfortunately don't have a display with a DP in so can't test.

[#6]

Try connecting your RX480 to a HD TV if possible and see if you get video output or try a different Video output on the GPU Card. Could be a defective GPU Port.

I have tried connecting it to a TV with the same issue; and I'll note additionally that the HDMI port works as it's the same one I used to confirm (on the other system) that the RX480 still works (with the same HDMI cable and monitor that I'm using when it doesn't provide a signal).

The GPU has 4 ports (1x HDMI, 3x DisplayPort) but I unfortunately don't have a display with a DP in so can't test.

[elstaci]

 I had a similar issue when I updated my FX8350 motherboard to a Ryzen Motherboard.

I had no video output from my Nividia 1070 GPU Card. I had it connected via DP and HDMI to my LG 4k Monitor. My motherboard Trouble LED kept indicating a GPU and System issue (No Video output).

My first AM4 Motherboard was DOA and the second was a different Motherboard model. I got video once when I reset my monitor's settings to default but when once I rebooted I again had no video output.

Finally first took my GPU Card to a computer shop who checked it for free by simply installing it on a motherboard with a monitor on it.  It booted up with no issue and video output.

So I knew my GPU card was good. Got home same issue. So I took my Tower computer case to the same computer shop and he hooked up his monitor. Again it started to boot up with no issue and with video output.

So now I knew my problem was with either my DP cable or monitor. I had both my 4K Computer monitor and my Samsung 2K TV hooked to my GPU card.

So I disconnected the cable to my DP/HDMI 4K Monitor and finally I had Video Output to my HDMI Samsung 2k TV. From there I changed my BIOS from UEFI to CSM.

Now I was able to get Video output to my DP 4k Monitor where I then changed my RAM Speed to the rated speed of 3600Mhz.

Later on I decide to try UEFI mode again and again I lost video output to my DP/HDMI 4k Monitor but not to my Samsung TV.

Both time I needed to physically disconnect my 4k Monitor to get video on my HDMI 2k TV Set.

This was on a Asus Motherboard by the way.

[Madsen03]

Thanks for sharing your experience!

I've tested the RX480 with another PC using the same monitor and HDMI cable that I'm having issues with now and it worked just fine; similarly, I have tried with both UEFI and CSM in my BIOS settings, no change with either. (I am doing this using a separate GPU).

This leads me to believe it's not a monitor or cable issue - though lord knows at this stage there's a distinct possibility that my new setup doesn't allow me to use HDMI some how some way. Issue is I don't have a display with DP on hand...

[elstaci]

So it is either your motherboard (PCIe lane issue), Possibly a CPU Issue (PCIe Lane issue) or BIOS Setting issue.

I would open a Support ticket with both your Motherboard and AMD to see if they believe it might be a hardware issue.

Since your RX480 works fine in another computer and you tried both CSM and UEFI than it does now indicate a Motherboard or CPU issue or possibly a BIOS Setting issue.

Do a CMOS CLEAR to set the BIOS to factory default and see if that help any. Otherwise I would purchase an Active DP>HDMI Adapter and see if you get video Output on the DP port.

[Madsen03]

So it is either your motherboard (PCIe lane issue), Possibly a CPU Issue (PCIe Lane issue) or BIOS Setting issue.

Have tried this on two separate motherboards so I'm fairly comfortable dismissing the first. Unsure about it being a CPU issue.

Do a CMOS CLEAR to set the BIOS to factory default and see if that help any. Otherwise I would purchase an Active DP>HDMI Adapter and see if you get video Output on the DP port

Have done CMOS resets, no dice. I might try the adapter idea though, yeah.

[elstaci]

I like to change my previous answer about the CPU. IF the CPU was defective (PCIe lane) than most likely no GPU card would work in that PCIe lane or work correctly.

So that probably eliminates the CPU since a different GPU card works fine in the same computer setup.

Same if the Motherboard PCIe lanes are bad, since you are able to run with different GPU cards installed without any issues.

So it is either a BIOS Setting issue or something is preventing your RX480 from outputting HDMI.

Try installing the RX480 in a different PCIe lane and see if it makes any difference? 

Some Users in the past have found out that the GPU card wouldn't work in the first PCIe lane but would on the second PCIe lane on the motherboard.

Also I presume you have the RX480 PCIe power cable firmly connected to the GPU Card?

You also might want to check your PSU power outputs if you install a different GPU card to get video by using OCCT.

[Madsen03]

Alright, figured I'd update this.

Unfortunately, for whichever poor sap has the same mindnumbing issue as I have here, I have not found a solution.

Instead, I've managed to sell my 480 and buy a 4gb 580 instead (for a profit to boot, go figure), which works flawlessly.