Desktop PC Freezing yet powered on.

Lately I've been experiencing a problem with my desktop PC .. It is a custom build.
1st the problem. Each morning I go to check the logs from last night's backup. Lately and without any pattern I'll occasionally find that my desktop, while running, is unresponsive to both my keyboard and mouse clicks. Only by pressing the reset button can I get back into the PC. My build is..

CURRENT SYSTEM COMPONENTS
ASUS AMD AM4 ROG Strix X570-E Gaming ATX Motherboard
AMD Ryzen 9 3950X 16-Core, 32-Thread Unlocked Desktop Processor
CORSAIR Vengeance RGB Pro 64GB (4 x 16GB) 288-Pin DDR4 SDRAM DDR4 3200
Corsair RMx Series (2021), RM850x, 850 Watt, GOLD power supply
ASUS TUF Gaming NVIDIA GeForce RTX 3080 Ti Graphics Card
WD_BLACK 2TB SN850X NVMe - Gen4 PCIe, M.2 2280 - C: (Boot)
WD_BLACK 2TB SN850X NVMe - Gen4 PCIe, M.2 2280 - 😧
Corsair iCUE H150i Elite CAPELLIX XT Liquid CPU Cooler - Three AF120 RGB Elite Fans - 360mm Radiator
Corsair iCUE Elite CPU Cooler LCD Display Upgrade Kit
CORSAIR 7000D AIRFLOW Full-Tower ATX PC Case, Black case

Windows 11 Pro 23H2 Build 22631.3737

Looking at the temps reported by the iCUE LCD the CPU is ~116 F and the pump shows ~95-96 F

I've run sfc /scannow with no problems found.

I reviewed the Event logs for System / Application et al and there is nothing in it The log stops at a different time each time with no discernable events that would indicate a problem. In the log I can find the last event date/time and then the messages from hours later when I press the reset to restart the PC.

There is no pattern to the problem. It'll go a couple of weeks, and the a couple of days. Today it was back to back with yesterday.