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No signal w/HP Z27q 5K via 2 x DP 1.2 @ RTX 3080 12 GB

Sven Killig
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Hello,

I wanted to ask whether anyone has successfully connected one of those monitors that need two parallel DisplayPort connections (HP Z27q 5K, Iiyama, Dell 8K) to a Geforce RTX 3080 12 GB. My Z27q either only shows distorted parts of the image or no signal at all and the secondary monitor looses signal; in the latter case the Windows 10 UI seems to be frozen (detected via VNC).

When I only connect the primary cable the video signal is fine, albeit only 4K.

Driver version: 516.94

Worked with my GTX 1070 and 1080 Ti.

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nvm, after Windows installed 511.76 after running CleanupTool.exe, 5K works 🤩

512.95 also works,

516.40 doesn't.

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