[NAME] The Latitude 5300's USB-C port only supports DisplayPort 1.2/HBR2 over USB-C.  That's enough bandwidth for 4K 60 Hz, but only if you're using all four high speed lanes in the USB-C connector for video.  When you connect a multi-purpose hub like you have, the USB-C link is configured as two lanes for USB 3.x data (even if you don't have any USB peripherals connected to the hub) and only two lanes for video. This cuts your video bandwidth in half, which is why you get 4K only at 30 Hz rather than 60.  If you want 4K 60 Hz, get a USB-C to HDMI 2.0 cable.  This will of course prevent you from using the USB-C port for other purposes at the same time, so if 4K 60 Hz and using other peripherals/ports will be a frequent need, you'd probably be better off getting a USB-A multi-purpose hub.Getting 4K 60 Hz and USB 3.x at the same time over a USB-C port would require either a system and hub that both support DisplayPort HBR3, or else Thunderbolt.  But the former isn't possible on your system model, and the latter was an option from the factory, but the DP logo rather than the Thunderbolt logo shown in your photo means it's an option your system doesn't have.  Getting it would require replacing the motherboard.I wrote a whole explainer post about USB-C with its various operating modes and impact on display setups here if you're curious to learn more.
Hi there,  I have a Dell Latitude 5300 with a USB-C port on the left-hand side. I'm trying to connect it to a Sony 4K TV (KD-49X8000E) to run 4K with at least 60Hz. I got this USB-C hub, connected it to the Dell's USB-C port and connected the hub to the Sony via HDMI. The max refresh rate I can seem to obtain is 30Hz.  How can I get the TV displaying 4K @ 60Hz?  Looking at the manual for my laptop, I can't really tell what type of USB-C port it has - the manual says it has the following: ● One USB 3.1 Gen 1 (Type-A) ports● One USB 3.1 Gen 1 with PowerShare● One USB Type-C 3.1 Gen 2 port with DisplayPort/Thunderbolt 3(optional) I've put a picture of the port below - hopefully that helps.  Also, my TV doesn't have any DisplayPort ports.  Thanks very much.    [IMAGE]
Dell Latitude 5300 USB-C to HDMI TV