Adding second screen via USB-C - fails

[Forum Man]

Given the Win 11 Pro system below, I tried to add a second monitor (DELL) on a USB-C port using an HDMI to USB-C adapter.
The system does not recognise the second monitor.
The system has three USB-C ports - one on the top front and two on the rear panel.
I tried all three without success.
The Mobo has an HDMI and Display Port input. The main monitor is on the HDMI port.
I am sourcing a HDMI to DP adapter but in the meantime had hoped to use the USB input.
The adapter works fine on my Surface laptop with the DELL monitor.
Any reason it doesn't work?
FM


Case
FRACTAL DEFINE 7 BLACK QUIET MID-TOWER CASE
Promotional Item
Get a discount code for 20% off select peripherals at Corsair.com
Processor (CPU)
AMD Ryzen 9 7900 12 Core CPU (4.0GHz-5.4GHz/76MB CACHE/AM5)
Motherboard
ASUS® TUF GAMING X670E-PLUS WIFI (AM5, DDR5, PCIe 5.0, Wi-Fi 6E)
Memory (RAM)
32GB Corsair VENGEANCE RGB DDR5 5600MHz (2 x 16GB)
Graphics Card
INTEGRATED GRAPHICS ACCELERATOR (GPU)
1st M.2 SSD Drive
512GB SOLIDIGM P44 PRO GEN 4 M.2 NVMe PCIe SSD (up to 7000MB/sR, 4700MB/sW)
1st M.2 SSD Drive
2TB SOLIDIGM P41+ GEN 4 M.2 NVMe PCIe SSD (up to 4125MB/sR, 3325MB/sW)
1st Storage Drive
6TB SEAGATE IRONWOLF PRO 3.5", 7200 RPM 256MB CACHE
Power Supply
CORSAIR 750W RMe SERIES™ MODULAR 80 PLUS® GOLD, ULTRA QUIET
Power Cable
1 x 1.5 Metre UK Power Cable (Kettle Lead)
Processor Cooling
DeepCool AK620 ZERO DARK High-Performance Dual Tower CPU Cooler
Thermal Paste
STANDARD THERMAL PASTE FOR SUFFICIENT COOLING
Sound Card
ONBOARD 6 CHANNEL (5.1) HIGH DEF AUDIO (AS STANDARD)
Network Card
ONBOARD 2.5Gbe LAN PORT
USB/Thunderbolt Options
MIN. 2 x USB 3.0 & 2 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS
Operating System
NO OPERATING SYSTEM REQUIRED

 

[SpyderTracks]

Given the Win 11 Pro system below, I tried to add a second monitor (DELL) on a USB-C port using an HDMI to USB-C adapter.
The system does not recognise the second monitor.
The system has three USB-C ports - one on the top front and two on the rear panel.
I tried all three without success.
The Mobo has an HDMI and Display Port input. The main monitor is on the HDMI port.
I am sourcing a HDMI to DP adapter but in the meantime had hoped to use the USB input.
The adapter works fine on my Surface laptop with the DELL monitor.
Any reason it doesn't work?
FM


Case
FRACTAL DEFINE 7 BLACK QUIET MID-TOWER CASE
Promotional Item
Get a discount code for 20% off select peripherals at Corsair.com
Processor (CPU)
AMD Ryzen 9 7900 12 Core CPU (4.0GHz-5.4GHz/76MB CACHE/AM5)
Motherboard
ASUS® TUF GAMING X670E-PLUS WIFI (AM5, DDR5, PCIe 5.0, Wi-Fi 6E)
Memory (RAM)
32GB Corsair VENGEANCE RGB DDR5 5600MHz (2 x 16GB)
Graphics Card
INTEGRATED GRAPHICS ACCELERATOR (GPU)
1st M.2 SSD Drive
512GB SOLIDIGM P44 PRO GEN 4 M.2 NVMe PCIe SSD (up to 7000MB/sR, 4700MB/sW)
1st M.2 SSD Drive
2TB SOLIDIGM P41+ GEN 4 M.2 NVMe PCIe SSD (up to 4125MB/sR, 3325MB/sW)
1st Storage Drive
6TB SEAGATE IRONWOLF PRO 3.5", 7200 RPM 256MB CACHE
Power Supply
CORSAIR 750W RMe SERIES™ MODULAR 80 PLUS® GOLD, ULTRA QUIET
Power Cable
1 x 1.5 Metre UK Power Cable (Kettle Lead)
Processor Cooling
DeepCool AK620 ZERO DARK High-Performance Dual Tower CPU Cooler
Thermal Paste
STANDARD THERMAL PASTE FOR SUFFICIENT COOLING
Sound Card
ONBOARD 6 CHANNEL (5.1) HIGH DEF AUDIO (AS STANDARD)
Network Card
ONBOARD 2.5Gbe LAN PORT
USB/Thunderbolt Options
MIN. 2 x USB 3.0 & 2 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS
Operating System
NO OPERATING SYSTEM REQUIRED

You can't carry video over USB C in that way, only via the display ports on the motherboard which will be HDMI or DP.

You're likely getting confused with Thunderbolt which uses the USB C connector but is a different protocol?

What model screen is it?

 

[Forum Man]

The monitor is S2440Lb - like myself, it's very old!!
I little more investigation verifies that I am indeed mistaken as you suggest.
I now understand Thunderbolt and my confusion.
The DP adapter should sort it.
Many thanks for your help.
FM