ROG STRIX B550-E GAMING USB-C port short and brick/freeze the PC

[Hyunbin]

My motherboard seemed to be partially shorted on USB-C port I recently transferred large files at a high speed, like 300mbps, via the usb-c port. A cable used for transferring was that when I bought SAMSUNG portable SSD T7(https://www.samsung.com/fi/memory-storage/portable-ssd/portable-ssd-t7-1tb-gray-mu-pc1t0t-ww/), I got the cable as well. That cable was used. It supports quite high speed. In the beginning, it showed 300mpbs. However, time goes by it slowed down and it is now 70 mbps-ish speed. The main issue is whenever an usb-c cable metal touched to the port, the computer becomes unrecoverable like brick/frozen mode. No any input from keyboards, mouses. Only forced power worked. I am suspecting it could be shorted. But how? Does anyone have experience like me or any clue?

Here, my all specification :
- ROG-STRIX-B550-E-GAMING, BIOS version 3607
- G.Skill F4-3600C16D-32GTZNC memory module 32 GB DDR4 3600 MHz
- ROG Strix 850W, 80 Plus Gold
- Windows 11 Home 64-bit (10.0, Build 26100)
- AMD Ryzen 7 3700X 8-Core Processor
- SAMSUNG 980 PRO M.2 PCIE4.0 NVME 1 TT

 

[Jiaszzz_ROG]

Hello @Hyunbin 

Thank you for reaching out to us, and sorry for any inconvenience the delayed response may have caused.
Regarding the situation you described, may we ask if clearing CMOS resulted in any improvement?
The latest BIOS version for the ROG STRIX B550-E GAMING is version 3621, released on April 7, 2024. Kindly consider whether an update to this version and clearing CMOS again after the update to rule out any potential configuration-related issues.
Additionally, certain power-saving options in Windows, such as Fast Startup, USB selective suspend, and device wake settings, may sometimes contribute to unstable connections or system abnormalities. We suggest disabling Fast Startup and related settings to see if the issue improves.
We also recommend cross-testing with different USB-C cables and external SSDs and connecting the device to different USB ports to help determine whether the issue may be isolated to a specific port or device. If possible, please also verify that the power outlet and any extension cords in use are properly grounded. Testing with an alternative outlet or via a UPS may further help isolate the issue.

Thank you.