AnsweredAssumed Answered

flashes/glitches when playing in full screen dual screen setup

Question asked by mrmadchemist on Dec 4, 2019
Latest reply on Apr 3, 2020 by cerenas



I recently installed a sapphire Radeon RX 580 GPU in my desktop PC.

Through HDMI I connected two (identical) full HD monitors.


When i try to play a game (for example, Sims 4) in full screen mode (on one monitor) the screen flashes wildly, different colors appear with each flash, like the GPU cannot handle it. If I close the game, the wild flashing stops, but now and then (roughly once a minute) a single flash appears. If I restart the PC, everything works as it should (until I load a game). The problem seems to get worse if there are more moving parts on the screen.


If I play a game in windowed mode, there is no problem at all. When I remove the HDMI cable from my 2nd screen, everything works as expected even in full screen mode.


I didn't test this with the Sims in-game, the problems already start in the main menu.


I cannot capture these "flashes" with ReLive. In the recordings it all looks normal.


I'm wondering if this is normal behaviour for a brand new GPU, or if there is something wrong.

- should I be able to play a game full screen on one monitor, while the other screen just shows windows desktop?

- could my CPU be the problem? (Intel i5 6402P)


Thanks in advance for your reactions!





GPU: Sapphire Radeon RX 580
CPU: Intel Core i5 6402P

Motherboard: Medion H110H4-EM (Intel Skylake chipset)


OS: Windows 10 64-bit
Radeon Version: 19.11.3

no overclocking on both CPU and GPU done.