Halo Infinite on PC help

Have a lock up issue with Infinite when playing with uncapped frame rates. PC specs are below, running the most up to date windows10, most current Infinite build and most up to date Nivida Drivers. If I set my frames over 120, say 165 to match my monitor it’ll crash after a few minutes, but at 120 it’ll run no problems. I don’t need to run crazy high frames but I’d like to know what’s wrong/not operating right.

Operating System: Windows 10 Home CPU: Intel Core i7-11700F 2.5GHz (4.9GHz Turbo) 8- Core 16-Thread • GPU: NVIDIA GeForce RTX 3060 Ti 8GB (Brand May Vary) Motherboard: Gigabyte B560 Motherboard • RAM: 16GB DDR4 3000MHZ (2x8GB) (XMP profile is enabled) SSD: 1TB Intel M.2 NVMe SSD CPU Cooler: RGB CPU Air Cooler • PSU: 700W 80 Plus Gold Case: Deepcool Macube 310 - White