Question Graphic errors when switching from two monitors to one ?

Nov 12, 2021
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Hey, I recently had another problem with my PC.

Specs:
ryzen 5 2600x,
RX580,
16gb ddr4,
SSDs,
any simple b450 mainboard
700w ps.

I used two gaming monitors from iiyama with the PC for at least 2 years. On all LANs I only had my one connected (via display port), which resulted in strange graphics errors at irregular intervals, followed by black screen, 1-3s freeze and mostly a crash. Occasionally there were also BLuescreens with BSOD errors. As soon as I used the second one again, there were no more problems. I recently switched to a larger monitor (also gaming iiyama monitor via DisplayPort). Now I have exactly the same problem ... the graphics bugs look exactly the same (red and green squares in a pattern). Yes, I updated, uninstalled and manually installed the GPU driver. It can't be due to a Windows update either. I'm desperate ... maybe someone knows what's going on here;).
 

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