I'm experiencing an issue with my new build where I can't use more than one monitor with my RTX 5080, no matter how I set up the DisplayPort connections. Here's a quick rundown of my system: I'm using an ASUS Prime Z890-P WIFI motherboard with an Intel Core Ultra 9 285K CPU and a Palit GeForce RTX 5080 GamingPro 16GB GPU, running Windows 11 (fully updated).
I have two monitors: an LG Ultrawide connected via DisplayPort and an HP 27f that I'm trying to connect through an active DP to HDMI adapter. The weird part is that both monitors work fine individually on any port. However, when I connect them both, only one of the DisplayPort outputs stays active, making it impossible to extend or duplicate the displays. Sometimes during the boot process, the display switches between monitors when the NVIDIA driver loads, but they never both stay active.
I've tried swapping cables, testing different combinations, changing BIOS settings, and updating all relevant drivers, but nothing has worked. Notably, if I connect one monitor to the CPU's iGPU output, both displays work during boot, but the iGPU disables once Windows loads. Has anyone encountered a similar issue or have any ideas on how to fix this?
3 Answers
You might want to try ditching the DisplayPort to HDMI adapter and just use the HDMI port on the GPU. However, from what I've read, if a monitor is connected to any DisplayPort, the HDMI output gets disabled. This could be a reason why you're having issues with the second monitor not showing any input.
Since it seems like you've done a lot of troubleshooting on your own, have you tried resetting the BIOS to default settings? Sometimes weird issues can be resolved that way. Also, consider contacting Palit support directly; they may have specific solutions for your card.
It sounds like a frustrating situation! First off, does your RTX 5080 have a vBIOS selector? Switching between silent and performance modes could make a difference. Also, check if you're using the standard NVIDIA driver or any specific Palit version, as there might be performance variations between them.
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