​
I’m trying to figure out whether anyone else has seen a similar issue with a Radeon RX 9070 XT, specifically DisplayPort instability while HDMI remains completely stable.
System: CPU: Ryzen 7 9700X
Motherboard: ASUS B650E MAX GAMING WIFI
GPU: SAPPHIRE NITRO+ Radeon RX 9070 XT
PSU: Montech Century II 850W (native 12V-2×6 cable)
RAM: DDR5 6000
Storage: WD Black SN7100 2TB
Monitors: 2× MSI G32CQ4 (1440p, 165Hz)
Setup has been tested in multiple configurations:
One monitor on DP, second on HDMI (currently most stable configuration)
Both monitors on DP (issue still occurs)
Single monitor on DP (issue still occurs)
Symptoms:
Random black screen on DisplayPort monitor for \~2–3 seconds, then signal returns
Happens at idle (web browsing, Spotify) and under load (gaming)
No system crash, no reboot, audio continues during blackout
HDMI output is completely stable at all times on the same system
What I’ve already tested:
Swapped DisplayPort cables (multiple cables tested)
Tested both DisplayPort outputs on GPU
Lowered refresh rate (165Hz → 144Hz/164Hz, no change)
Disabled sleep (monitors only turn off after 15 min, system never sleeps)
Disabled hardware acceleration in Chrome and Firefox
Updated to latest AMD Adrenalin drivers
Clean driver reinstall (no change)
Tested gaming under full load for hours (stable in some cases, but issue still appears at idle/light use)
Observations:
Issue appears to be DisplayPort-specific only
HDMI is fully stable under identical conditions
Problem seems random but more common during low load / idle state transitions
Current working theory: This may be related to DisplayPort link training / power-state transition behavior between the GPU and MSI G32CQ4 monitors, or a DisplayPort subsystem issue on the GPU itself. Not seeing signs of general system instability or power issues.
Question: Has anyone seen similar behavior with RX 7000/9000-series cards where:
HDMI is stable but DP intermittently blacks out
System remains running normally
Issue occurs at idle or light use rather than load
Trying to determine if this is a known AMD driver/firmware issue, a monitor compatibility issue, or potentially a faulty GPU.
Thank you to anyone who has any insight on the issue!