F5F Stay Refreshed Hardware Desktop Issues with 8K display problems!

Issues with 8K display problems!

Issues with 8K display problems!

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jornare04
Junior Member
42
01-17-2026, 07:33 AM
#1
Hi, your RX6400 connected through HDMI to an 8K TV with a high-quality 8K cable is functioning well at 30Hz. At 60Hz it works for short periods (5 to 10 minutes) but the screen becomes corrupted by about 10%. Restarting resolves the issue, and rebooting the PC/TV after a power cycle helps too. You've already tried changing the HDMI cable, lowering color depth, updating drivers, and reducing color depth—any other suggestions would be appreciated. Thanks, Martin.
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jornare04
01-17-2026, 07:33 AM #1

Hi, your RX6400 connected through HDMI to an 8K TV with a high-quality 8K cable is functioning well at 30Hz. At 60Hz it works for short periods (5 to 10 minutes) but the screen becomes corrupted by about 10%. Restarting resolves the issue, and rebooting the PC/TV after a power cycle helps too. You've already tried changing the HDMI cable, lowering color depth, updating drivers, and reducing color depth—any other suggestions would be appreciated. Thanks, Martin.

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DrBsTigger
Member
59
01-19-2026, 02:24 AM
#2
The RX6400 supports up to 7680x4320 resolution. To ensure a consistent display, you should reduce the resolution.
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DrBsTigger
01-19-2026, 02:24 AM #2

The RX6400 supports up to 7680x4320 resolution. To ensure a consistent display, you should reduce the resolution.

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__Sammeh__
Junior Member
4
01-19-2026, 04:22 AM
#3
Duplicate connections, new graphics cards, and a 7680x4320 monitor at 8K resolution. The motherboard is listed with HDMI 2.1, though actual speed isn't confirmed. I picked up the datasheet for an MSI RX6400 which confirms 8K60 capability.
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__Sammeh__
01-19-2026, 04:22 AM #3

Duplicate connections, new graphics cards, and a 7680x4320 monitor at 8K resolution. The motherboard is listed with HDMI 2.1, though actual speed isn't confirmed. I picked up the datasheet for an MSI RX6400 which confirms 8K60 capability.

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Miss_Mayra
Junior Member
9
01-19-2026, 10:54 AM
#4
The best setting for the RX6400 is 1080p resolution.
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Miss_Mayra
01-19-2026, 10:54 AM #4

The best setting for the RX6400 is 1080p resolution.

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jenavafan123
Member
60
01-23-2026, 07:37 AM
#5
The ideal setting applies to achieving a consistent screen output. The user aims for a reliable display performance without needing extreme resolutions like 8K. Standard desktop and video playback should work adequately.
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jenavafan123
01-23-2026, 07:37 AM #5

The ideal setting applies to achieving a consistent screen output. The user aims for a reliable display performance without needing extreme resolutions like 8K. Standard desktop and video playback should work adequately.

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alvinmrb
Member
54
01-23-2026, 07:48 AM
#6
The rx6400 lacks a media engine, making it a poor choice. Your CPU must handle decoding and encoding video, which could indicate a faulty connection. Are you experiencing this issue now?
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alvinmrb
01-23-2026, 07:48 AM #6

The rx6400 lacks a media engine, making it a poor choice. Your CPU must handle decoding and encoding video, which could indicate a faulty connection. Are you experiencing this issue now?

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csonic59
Junior Member
2
01-23-2026, 09:47 AM
#7
Ideal for PC gaming and high-quality video on a TV. May support 2160p resolution.
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csonic59
01-23-2026, 09:47 AM #7

Ideal for PC gaming and high-quality video on a TV. May support 2160p resolution.

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EssieFlo
Member
174
02-02-2026, 11:47 AM
#8
I'm not trying to argue that this is a good idea, hell the OP hasn't even stated the purpose. You're reading into things that don't exist. The point is, that you seem to be missing, is that the GPU they have is advertised to output an 8K60 signal. Period. That's all we're being asked for help with. Not if its a good idea for a HTPC, not if it can play games. But simply if it can output a stable desktop resolution and refresh rate of 8K60.
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EssieFlo
02-02-2026, 11:47 AM #8

I'm not trying to argue that this is a good idea, hell the OP hasn't even stated the purpose. You're reading into things that don't exist. The point is, that you seem to be missing, is that the GPU they have is advertised to output an 8K60 signal. Period. That's all we're being asked for help with. Not if its a good idea for a HTPC, not if it can play games. But simply if it can output a stable desktop resolution and refresh rate of 8K60.

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burak123123
Member
224
02-02-2026, 09:52 PM
#9
It occurs regularly, yet I rely on it for showing 8xQHD cameras. The RX6400 runs at half CPU when using GridPlayer. I'll attempt the fix as mentioned earlier!
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burak123123
02-02-2026, 09:52 PM #9

It occurs regularly, yet I rely on it for showing 8xQHD cameras. The RX6400 runs at half CPU when using GridPlayer. I'll attempt the fix as mentioned earlier!

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RonanWilk
Member
158
02-03-2026, 12:24 AM
#10
They mentioned the goal. Linking the RX6400 to an 8K display would likely improve performance. 2160p should run more smoothly.
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RonanWilk
02-03-2026, 12:24 AM #10

They mentioned the goal. Linking the RX6400 to an 8K display would likely improve performance. 2160p should run more smoothly.

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