Laptop with additional USB-C display causes overall system slowdown
Laptop with additional USB-C display causes overall system slowdown
Hey guys, I've been looking but can't find this exact use case so hopefully someone has some insights. I've got a new PC build with a 7800X3d and an RX7900XTX. Due to a lack of room on my desk I tend to use a USB C screen as a second monitor (a 15" asus zenscreen). What I've noticed is that when the monitor is connected and I'm running higher display demand like in games first the USB C monitor starts to loose framerate and even in higher demand games I've got stuttering on my main monitor to. When I disconnect the USB C monitor and just play on my main monitor everything runs smooth as can be. Anyone seen this kind of behavior before? I've been looking into getting a DP to USB C cable so I can hook the zenscreen up to my graphicscard directly instead of on to the motherboard but problem there is that I need power over the same USB C cable and havent found a solution for that yet either.
I'm using the X670E carbon Wi-Fi card. The USB C port has a display function, which is a feature on the board. I understand there are ways to enable Thunderbolt on AMD, but I haven't tried it much on Intel and preferred not to pursue that path.
The only method to connect a DisplayPort via USB C is through Thunderbolt. Either your system lacks the newest Thunderbolt version (check the motherboard site) or you're using a cable that doesn't support it.
It seems the board in question lacks an Intel Maple Ridge Thunderbolt/USB4 controller, but it does allow DP-Alt Mode over Type C from the iGPU. I'm using a secondary display connected via its Type C port on the X670E Taichi through the iGPU, which uses an Intel TB4/USB4 controller. No problems detected. Updating the iGPU video drivers, the main GPU drivers, and the chipset driver might help. It's unclear why this affects the primary display so much.
The only ideas that came to mind were: if the settings are too high and the GPU is running low on VRAM (unlikely), then it would be fighting for system RAM with the iGPU, which would slow everything down. If the iGPU is consuming excessive power, it might be throttling the CPU. Neither seems very probable. @Onoref What's shown on the iGPU monitor?