Question Blue lightning (flashing) anomaly in game with RX 9070 XT ?

[Alexoferith]

Hi, I wonder if anyone can help me, especially experienced AMD GPU users.

System Specs
Ryzen 7 9800 X3D CPU with 360 AIO
MSI MAG B850m Mortar WIFI mobo
32Gb DDR5 RAM 6000
PowerColor Radeon RX 9070 XT
Win 11 Pro 64bit debloated using Winhance
2Tb SSD
1000W GPU
27" ASUS XG27UCG (160Hz @ 4K, 320Hz @ 1080p) currently running @ 4K

While playing Ghost of Tsushima with this new rig of mine, every now and then, I noticed that the surface of the backdrop, be it the surface of a small hill, or bamboos in forest, or walls of a building, inside and outside, there were flashing as if there was lightning. At first I thought it was lightning but when it happened inside a house or even a cave, I realized that it was not lightning but a defect. Oh, I have to add that I completed the game using an ASUS gaming laptop which died due to overheat and it had a laptop RTX 3080 GPU. There was no such "flashing" problem.

I had been a NVidia users since 2,000 and this is my first all AMD setup. So, I am still learning Adrenaline. I followed some Youtube videos and undervolt the 9070XT. I got amazing result, both fps and temp. For the previous laptop, I had average 65 to 75 fps, and between 80 to 95 degree Celicus. Now, I am running this game at average 150 to 250 fps and 48 degree Celicus!!!! Oh, no crashing, until this "blue flashing" defect appearing. I cannot remember what I had done to the setting just before this happened. I only remember that apart from the undervolting, I was trying to understand and learn about the resolution scaling up feature.

I have the latest version of Adrenaline installed. So, does anyone has any idea? I would be most grateful if anyone can help. Many many thanks in advance.

PS: since the blue flashing appearing, I have now disabled the resolution scaling up feature. The game is now running @4K and not 3200x1800 (which would be scaled up to 4K if the aforementioned feature is enabled in Adrenaline)

 

[Lutfij]

1000W GPU
I think you meant PSU instead of GPU. 1000W is he advertised wattage of the unit, what is the make, model and age of the PSU?

Ryzen 7 9800 X3D CPU with 360 AIO
Is the iGPU disabled in BIOS?

Speaking of BIOS,
MSI MAG B850m Mortar WIFI mobo
what BIOS version are you on for your motherboard at this moment of time?
I cannot remember what I had done to the setting just before this happened. I only remember that apart from the undervolting, I was trying to understand and learn about the resolution scaling up feature.
Revert to defaults and see if the issue is resolved, then perform the undervolt again, then tinker with other aspects of the GPU until you've narrowed down what causes the blue light flickering.

If that doesn't help, I'd advice using DDU in Safe Mode, remove all GPU drivers(Intel, Nvidia and AMD) then manually reinstall the driver of a version prior, sourced from AMD's support site, in an elevated command, i.e, Right click installer>Run as Administrator.

 

[Alexoferith]

1000W GPU
I think you meant PSU instead of GPU. 1000W is he advertised wattage of the unit, what is the make, model and age of the PSU?

Ryzen 7 9800 X3D CPU with 360 AIO
Is the iGPU disabled in BIOS?

Speaking of BIOS,
MSI MAG B850m Mortar WIFI mobo
what BIOS version are you on for your motherboard at this moment of time?
I cannot remember what I had done to the setting just before this happened. I only remember that apart from the undervolting, I was trying to understand and learn about the resolution scaling up feature.
Revert to defaults and see if the issue is resolved, then perform the undervolt again, then tinker with other aspects of the GPU until you've narrowed down what causes the blue light flickering.

If that doesn't help, I'd advice using DDU in Safe Mode, remove all GPU drivers(Intel, Nvidia and AMD) then manually reinstall the driver of a version prior, sourced from AMD's support site, in an elevated command, i.e, Right click installer>Run as Administrator.

Thank you very much for your response.
1. No. It is a 1000W PSU. It is a Chinese made Platinum grade PSU. Brand name in Chinese. The whole rig was purchased back in May.
2. I only disabled the iGPU in Device Manager of Windows. In the BIOS, I have left it as Auto.
3. I have checked that the BIOS of the mobo is the latest version. The undervolting was done within Adrenaline and not in the BIOS. In the BIOS, I only changed the memory to the one that is meant for AMD so the memory can run at 6000 MHz.
4. I actually used DDU to remove the GPU driver installed by Windows and then installed the latest version afterward.

Just want to mention that, well, I cannot remember if the blue flashing (lightning like effect) was there before I undervolted the GPU. But I was so amazed by the temperature drop of the GPU once I undervolted it. Also, the lost in FPS is so low that the benefit of undervolting is so amazing. I mean the wattage used by the GPU has dropped from 320 to 220!!! As a result, the GPU never runs higher than 50 degree C!!! And the FPS in game was 320, with FSR on. Absolutely amazing. Unfortunately, then I got this blue flashing effect. I am not sure if this may have something to do with the FSR 4.

 

[Lutfij]

1. No. It is a 1000W PSU. It is a Chinese made Platinum grade PSU. Brand name in Chinese. The whole rig was purchased back in May.
That doesn't help us. Pass on an image of the stickered sides of the PSU. Hos the the image on a site a link to Imgur then pass on a link for us to look through.

2. I only disabled the iGPU in Device Manager of Windows. In the BIOS, I have left it as Auto.
You're best off disabling it in BIOS.

3. I have checked that the BIOS of the mobo is the latest version.
For the sake of relevance, please state the BIOS version.

 

[Alexoferith]

1. That doesn't help us. Pass on an image of the stickered sides of the PSU. Hos the the image on a site a link to Imgur then pass on a link for us to look through.

I am very sorry. Due to space restriction (took me over an hour to postion the rig in the current location), it is fairly cumbersome and time consuming to undo everything, especially when the PSU is postioned behind kind of a shroud. But I understand your concern of a defective PSU, causing unclean supply or/and unsteady current or wattage.

2. You're best off disabling it in BIOS.

As far as I can see, there are only two choices for the onboard GPU selection: Auto & Ignore. I presume "Ignore" mean that it will default to the onboard GPU. That is to say that I can only disable the onboard GPU via Device Manager of Windows OS.

3. For the sake of relevance, please state the BIOS version.

Version of BIOS: E7E61AMSI.1A30
Build Date: 18 April 2025